xcat-core/xCAT-server/sbin/xcatconfig

#!/usr/bin/env perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
#

#-----------------------------------------------------------------------------

=head1    xcatconfig



 This is script is called during the initial installation of xCAT
    It can also be called directly to various parts of the configuration
    root ssh keys,  node host keys, credentials database setup or all

=cut

BEGIN
{
    $::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
    $::XCATDIR  = $ENV{'XCATDIR'}  ? $ENV{'XCATDIR'}  : '/etc/xcat';
}

use lib "$::XCATROOT/lib/perl";
use strict;
use xCAT::Utils;
use xCAT::NetworkUtils;
use Getopt::Long;
use xCAT::MsgUtils;
use xCAT::Table;
use Socket;

#-----------------------------------------------------------------------------
# Main

$::progname = "xcatconfig";
my $args = join ' ', @ARGV;
$::command = "$0 $args";
Getopt::Long::Configure("bundling");
$Getopt::Long::ignorecase = 0;

# Default Install dir location
$::INSTALLDIR = "/install";

# Default TFTP dir location
$::TFTPDIR = "/tftpboot";

# parse the options
if (
    !GetOptions(
                'f|force'           => \$::FORCE,
                'i|initinstall'     => \$::INITIALINSTALL,
                'u|updateinstall'   => \$::UPDATEINSTALL,
                'k|sshkeys'         => \$::genSSHRootKeys,
                's|sshnodehostkeys' => \$::genSSHNodeHostKeys,
                'c|credentials'     => \$::genCredentials,
                'd|database'        => \$::initDB,
                'h|help'            => \$::HELP,
                'v|version'         => \$::VERSION,
                'V|verbose'         => \$::VERBOSE,
                'installdir=s'      => \$::INSTALLDIR,
                'tftpdir=s'         => \$::TFTPDIR,
    )
  )
{
    &usage;
    exit(1);
}

if (   (!$::HELP)
    && (!$::FORCE)
    && (!$::INITIALINSTALL)
    && (!$::UPDATEINSTALL)
    && (!$::genSSHRootKeys)
    && (!$::genSSHNodeHostKeys)
    && (!$::genCredentials)
    && (!$::initDB)
    && (!$::VERSION))
{
    &usage;
    exit(1);
}

# display the usage if -h or --help is specified
if ($::HELP)
{
    &usage;
    exit(0);
}

# display the version statement if -v or --verison is specified
if ($::VERSION)
{
    my $version = xCAT::Utils->Version();
    $version .= "\n";
    xCAT::MsgUtils->message("N", $version);
    exit 0;
}
if ($::FORCE)
{
    if (   $::INITIALINSTALL
        || $::UPDATEINSTALL
        || $::genSSHRootKeys
        || $::genSSHNodeHostKey
        || $::genCredentials
        || $::initDB)
    {
        my $warning =
          " The -f flag includes the function for the -i, -u, -k, -s, -c, -d flags. Do not combine with other flags.\n ";
        xCAT::MsgUtils->message("N", $warning);
        exit 1;
    }
}
if (($::INITIALINSTALL) && ($::UPDATEINSTALL))
{
    my $warning =
      " The -i and -u flags may not be input to the command. Use one or the other. \n ";
    xCAT::MsgUtils->message("N", $warning);
    exit 1;
}

#
# Display command
#
verbose("Running $::command");
if (xCAT::Utils->isAIX())
{
    $::osname = 'AIX';
}
else
{
    $::osname = 'Linux';
}

#
# To support AIX INUCLIENTS, to support the scenario where the user needs to install xCAT rpms
# into the INUCLIENT=1 environment, such as AIX diskless node(installing xCAT in AIX NIM SPOT), 
# or alternative disk installation.
#

if (($::osname eq 'AIX') && ($ENV{'INUCLIENTS'} == 1))
{
    # INUCLIENTS is configured, add xcatconfig to /etc/inittab
    my $cmd = "/usr/sbin/lsitab xcatconfig > /dev/null 2>&1";
    my $rc = system("$cmd") >>8;
    if ($rc != 0)
    {
        # add new entry
        my $flag;
        if ($::INITIALINSTALL)
        {
            $flag = "-i";
        }

        if ($::UPDATEINSTALL)
        {
            $flag = "-u";
        }

        if ($::initDB)
        {
            $flag = "-d";
        }
        
        my $mkcmd = qq~/usr/sbin/mkitab "xcatconfig:2:once:$::XCATROOT/sbin/xcatconfig $flag > /dev/console 2>&1"~;
        system("$mkcmd");
    }
    exit(0);
}

if ($::osname eq 'AIX')
{
    $::arch = `uname -p`;
    #$::root = "";
    $::root = xCAT::Utils->getHomeDir();
}
else
{
    $::arch = `uname -m`;
    $::root = "/root";
}
chomp $::arch;
chomp $::root;


# some Linux-only config
# Do not need to start vsftpd here, because when xcatd starts, it will restart it
#if ($::osname eq 'Linux')
#{
# start vsftpd
#    my $cmd    = "/sbin/chkconfig vsftpd on";
#    my $outref = xCAT::Utils->runcmd("$cmd", 0);
#    my $cmd    = "/etc/init.d/vsftpd restart";
#    my $outref = xCAT::Utils->runcmd("$cmd", 0);
#    if ($::RUNCMD_RC != 0)
#    {
#        xCAT::MsgUtils->message('E', "Could not start VSFTPD.");
#    }
#    else
#    {
#        xCAT::MsgUtils->message('I', "VSFTPD has been restarted.");
#    }
#}    # end Linux-only

#
# Generate ssh host keys for the nodes
#
#
if (xCAT::Utils->isMN()) {
  &genSSHNodeHostKey;
}
#
#  gen root's ssh keys, if needed and copy to appropriate directories to
#  be used during install
#
if ($::INITIALINSTALL || $::FORCE || $::genSSHRootKeys)
{
    &genSSHRootKeys;    # gen new rsa ssh key for root
}

#
#	Update /etc/profile on AIX
#
if ($::INITIALINSTALL)
{
    my $profname = "/etc/profile";
    if ($::osname eq 'AIX')
    {
        my $cmd = qq~cat $profname | grep "XCATROOT"~;
        my $outref = xCAT::Utils->runcmd("$cmd", -1);
        if ($::RUNCMD_RC != 0)
        {

            # make back up file
            my $cpcmd = qq~/bin/cp -p $profname $profname.orig~;
            my $outref = xCAT::Utils->runcmd("$cpcmd", 0);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message('E', "Could not copy $profname.");
            }

            # add xCAT paths
            my $eccmd =
              qq~echo '# xCAT setup\nXCATROOT=$::XCATROOT\nPATH=\$XCATROOT/bin:\$XCATROOT/sbin:\$PATH\nMANPATH=\$XCATROOT/share/man:\$MANPATH\nexport XCATROOT PATH MANPATH' >>$profname~;
            $outref = xCAT::Utils->runcmd("$eccmd", 0);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message('E', "Could not update $profname.");
            }
        }
    }
}

if ($::INITIALINSTALL || $::FORCE || $::UPDATEINSTALL)
{

    #
    # For all MNs create /var/log/consoles if needed
    # Conserver won't start without it
    #
    if (!-d "/var/log/consoles")
    {
        my $cmd = "/bin/mkdir -p /var/log/consoles";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',
                               "Could not create /var/log/consoles directory.");
        }
        else
        {
            verbose("Created /var/log/consoles directory.");
        }
    }

    if ($::osname eq 'AIX')
    {
        xCAT::Utils->setupAIXconserver($::VERBOSE);

        &setupAIXIPMITool;

        # Add the xcatd subsystem to the AIX
        no strict 'refs';
        my $mkssys_cmd =
          "mkssys -p $::XCATROOT/sbin/xcatd -s xcatd -u 0 -S -n 15 -f 15 -a \"-f\"";
        system($mkssys_cmd);
        use strict;

        # if not Update,  add to inittab
        #  breaks HAMS to add on update
        if (! $::UPDATEINSTALL) {
		# for AIX systems add xcatd to the /etc/inittab file
		# add xcatd entry if one does not exist
		my $rcmd = "/bin/cat /etc/inittab | grep 'xcatd'";
		my $outref = xCAT::Utils->runcmd("$rcmd", -1);
		if ($::RUNCMD_RC != 0) {
                   my $mkitab_cmd =
                  "mkitab \"xcatd:2:once:$::XCATROOT/sbin/restartxcatd > /dev/console 2>&1\" > /dev/null 2>&1";
		   xCAT::Utils->runcmd("$mkitab_cmd", 0);
		   if ($::RUNCMD_RC != 0) {
                    xCAT::MsgUtils->message('E', "Could not set up inittab.");
		   }
		}
         }

        # add AIX needed exports
        &setupAIXexports;

    }

    else    # for Linux
    {
        &setupLinuxexports;    # add Linux exports

    }
}    # end install,update or force

#
#  set up the certificates for xcatd, gen new ones if requested or do not exist
#
if ($::INITIALINSTALL || $::UPDATEINSTALL || $::FORCE || $::genCredentials)
{
    &genCredentials;
}

#
# Setup  database
#
if ($::INITIALINSTALL || $::UPDATEINSTALL || $::FORCE || $::initDB)
{
    &initDB;
}

#
# set up syslog
#
# use postscript to set up syslog
if ($::INITIALINSTALL || $::FORCE || $::UPDATEINSTALL)
{
    my $cmd = "$::INSTALLDIR/postscripts/syslog";
    my $outref = xCAT::Utils->runcmd("$cmd", 0);
    if ($::RUNCMD_RC != 0)
    {
        xCAT::MsgUtils->message('E', "Could not set up syslog.");
    }
    else
    {
        verbose("syslog has been set up.");
    }
}


#

#
#  start xcatd
#
if ($::INITIALINSTALL || $::FORCE || $::UPDATEINSTALL || $::genCredentials)
{
    my $xcmd;
    if ($::osname eq 'AIX')
    {
        $xcmd = "$::XCATROOT/sbin/restartxcatd";
    }
    else
    {
        $xcmd = "/etc/init.d/xcatd restart";
    }
    system($xcmd);
}

# more  config needed after xcatd start
if ($::INITIALINSTALL || $::FORCE)
{
    my $cmd;
    if ($::osname eq 'Linux') {
     #Zap the almost certainly wrong pxelinux.cfg file
     if (-f "$::TFTPDIR/pxelinux.cfg/default")
     {
        $cmd = "/bin/rm $::TFTPDIR/pxelinux.cfg/default";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',
                             "Could not remove $::TFTPDIR/pxelinux.cfg/default");
        }
        else
        {
            verbose("Removed $::TFTPDIR/pxelinux.cfg/default.");
        }
     }

     # run mknb - only needed for Intel platforms for now
     &mknb;

     # makenetworks and setup http
     &makenetworks;
     &setuphttp;

     my $linux_note =
      "xCAT is now running, it is recommended to tabedit networks \nand set a dynamic ip address range on any networks where nodes \nare to be discovered. Then, run makedhcp -n to create a new dhcpd \nconfiguration file, and \/etc\/init.d\/dhcpd restart. Either examine sample \nconfiguration templates, or write your own, or specify a value per \nnode with nodeadd or tabedit.";
     xCAT::MsgUtils->message('I', $linux_note);
   } else { #AIX
     # makenetworks
     &makenetworks;

     my $AIX_note =
      "xCAT is now running.";
     xCAT::MsgUtils->message('I', $AIX_note);
   }

}    #End - more - Linux-only config

END
{
    # Remove xcatconfig itself from the inittab

    if (($::osname eq 'AIX') && ($ENV{'INUCLIENTS'} != 1))
    {
        my $cmd = "/usr/sbin/lsitab xcatconfig > /dev/null 2>&1";
        my $rc = system("$cmd") >>8;
        if ($rc == 0)
        {
            my $rmcmd = '/usr/sbin/rmitab xcatconfig';
            system("$rmcmd");
        }    
    }
}

exit;

#####################################
#  subroutines
#####################################

#-----------------------------------------------------------------------------

=head3    usage 
	
	Displays message for -h option

=cut

#-----------------------------------------------------------------------------

sub usage
{
    xCAT::MsgUtils->message(
        'I',
        "Usage:\nxcatconfig - Performs basic xCAT setup operations on an xCAT management node. This command should not be run on an xCAT Service Node, unless you are making it a Management Node.\n"
        );
    xCAT::MsgUtils->message(
        'I',
        "xcatconfig [-h|--help]\nxcatconfig [-v|--version]\nxcatconfig [-f|--force] [-V|--verbose]\nxcatconfig [-i|--initinstall] [-V|--verbose]\nxcatconfig [-u|--updateinstall] [-V|--verbose]\nxcatconfig [-k|--sshkeys] [-s|--sshnodehostkeys] [-c|--credentials] [-d|database] [-V|--verbose]"
        );
}

sub verbose
{
    if (!$::VERBOSE) { return; }
    my $msg = shift;
    xCAT::MsgUtils->message("I", $msg);
}

#-----------------------------------------------------------------------------

=head3    genSSHRootKeys 
	
     Will generate a new ssh rsa key for the root user, if it does not exist or if requested by the input -k flag.

=cut

#-----------------------------------------------------------------------------

sub genSSHRootKeys

{

    #
    # create /.ssh dir if needed
    #
    my $sshdir = "$::root/.ssh";
    if (!-d $sshdir)
    {
        my $cmd = "/bin/mkdir -m 700 -p $sshdir";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Could not create $sshdir directory.");
        }
        else
        {
            verbose("Created $sshdir directory.");
        }
    }

    #
    # create or modify the -/.ssh/config file
    #
    my $cfgfile = "$::root/.ssh/config";
    if (-f $cfgfile)
    {

        # it exists - so see if it needs to be updated
        my $cmd = "/bin/cat $cfgfile | grep 'StrictHostKeyChecking no'";
        my $outref = xCAT::Utils->runcmd("$cmd", -1);
        if ($::RUNCMD_RC != 0)
        {

            # ok - then add this entry
            my $cmd =
              "/bin/echo StrictHostKeyChecking no >> $cfgfile; chmod  600 $cfgfile";
            my $outref = xCAT::Utils->runcmd("$cmd", 0);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message('E',
                                        "Could not update the $cfgfile file.");
            }
            else
            {
                xCAT::MsgUtils->message('I',
                                        "Added updates to the $cfgfile file.");
            }
        }
    }
    else
    {

        # file doesn't exist so just create it
        my $cmd =
          "/bin/echo StrictHostKeyChecking no > $cfgfile; chmod  600 $cfgfile";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Could not update the $cfgfile file.");
        }
        else
        {
            xCAT::MsgUtils->message('I', "Added updates to the $cfgfile file.");
        }
    }

    #
    #  create /install/postscripts/_ssh if needed
    #
    if (!-d "$::INSTALLDIR/postscripts/_ssh")
    {
        my $cmd = "/bin/mkdir -m 755 -p $::INSTALLDIR/postscripts/_ssh";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',
                       "Could not create $::INSTALLDIR/postscripts/_ssh directory.");
        }
        else
        {
            verbose("Created $::INSTALLDIR/postscripts/_ssh directory.");
        }
    }

    #need to gen a new rsa key for root ssh, if Force, genkey or does not exist
    my $pubfile = "$::root/.ssh/id_rsa.pub";
    my $rsafile = "$::root/.ssh/id_rsa";

    # if exists,  and generated new then
    # need to remove the old files
    if ((-r $pubfile) && ($::FORCE || $::genSSHRootKeys))
    {

        my $cmd = "/bin/rm $::root/.ssh/id_rsa*";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',
                  "Could not remove id_rsa files from $::root/.ssh directory.");
        }
        else
        {
            xCAT::MsgUtils->message('I',
                           "Removed id_rsa files from $::root/.ssh directory.");
        }
    }

    # ssh key does not exist, gen a new one else leave alone
    if (!-r $pubfile)
    {
        my $cmd = "/usr/bin/ssh-keygen -t rsa -q -b 2048 -N '' -f $rsafile";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Could not generate $pubfile.");
        }
        else
        {
            xCAT::MsgUtils->message('I', "Generated $pubfile.");

        }
    }

    # copy authorized_keys for install on node
    if (-r $pubfile)
    {
        my $cmd =
          "/bin/cp -p $pubfile $::INSTALLDIR/postscripts/_ssh/authorized_keys ";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message(
                'E',
                "Could not copy $pubfile to $::INSTALLDIR/postscripts/_ssh/authorized_keys."
                );
        }
        else
        {
            xCAT::MsgUtils->message(
                 'I',
                 "Copied $pubfile to $::INSTALLDIR/postscripts/_ssh/authorized_keys."
                 );
        }
    }
    else
    {
        xCAT::MsgUtils->message(
            'E',
            "Could not copy $pubfile to $::INSTALLDIR/postscripts/_ssh/authorized_keys,because $pubfile does not exist."
            );
    }
}

#-----------------------------------------------------------------------------

=head3    genSSHNodeHostKey 
	
  If node private node hostkeys do not exist in either directory or force option
   or generate host key option, we need to generate them
   These keys are installed on the nodes in /etc/ssh directory and allow the
   node to ssh without password node to node.   
   They are store in /etc/xcat/hostkeys on the MN.
   This also includes some migration to /install/postscripts/hostkeys
   for the install process 

=cut

#-----------------------------------------------------------------------------

sub genSSHNodeHostKey

{

    my $hostkey  = "$::INSTALLDIR/postscripts/hostkeys/ssh_host_rsa_key";
    my $hostkey2 = "/etc/xcat/hostkeys/ssh_host_rsa_key";
    if (   ((!-r $hostkey) && (!-r $hostkey2))
        || $::FORCE
        || $::genSSHNodeHostKeys)
    {

        #  create directories /etc/xcat/hostkeys and /install/postscripts/hostkeys
        if (!-d "$::INSTALLDIR/postscripts/hostkeys")    # directory for public keys
        {
            my $cmd = "/bin/mkdir -m 755 -p $::INSTALLDIR/postscripts/hostkeys";
            my $outref = xCAT::Utils->runcmd("$cmd", 0);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message(
                     'E',
                     "Could not create $::INSTALLDIR/postscripts/hostkeys directory."
                     );
            }
        }
        if (!-d "/etc/xcat/hostkeys")    # directory for public/private keys
        {
            my $cmd = "/bin/mkdir -p /etc/xcat/hostkeys";
            my $outref = xCAT::Utils->runcmd("$cmd", 0);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message('E',
                              "Could not create /etc/xcat/hostkeys directory.");
            }
        }

        # remove the old keys
        if (-r $hostkey)
        {
            my $cmd = "/bin/rm $::INSTALLDIR/postscripts/hostkeys/ssh_host*";
            my $outref = xCAT::Utils->runcmd("$cmd", -1);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message(
                    'I',
                    "Could not remove ssh keys from $::INSTALLDIR/postscripts/hostkeys directory. They may not exist."
                    );
            }
        }

        # remove the old keys
        if (-r $hostkey2)
        {
            my $cmd = "/bin/rm /etc/xcat/hostkeys/ssh_host*";
            my $outref = xCAT::Utils->runcmd("$cmd", -1);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message(
                    'I',
                    "Could not remove ssh keys from /etc/xcat/hostkeys directory. They may not exist."
                    );
            }
        }

        #
        # generate new hostkeys
        #
        xCAT::MsgUtils->message('I', "Generating new node hostkeys...");
        xCAT::MsgUtils->message('I', "Generating SSH1 RSA Key...");
        my $cmd =
          "/usr/bin/ssh-keygen -t rsa1 -f /etc/xcat/hostkeys/ssh_host_key -C '' -N ''";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Could not generate SSH1 RSA key.");
        }

        xCAT::MsgUtils->message('I', "Generating SSH2 RSA Key...");
        $cmd =
          "/usr/bin/ssh-keygen -t rsa -f /etc/xcat/hostkeys/ssh_host_rsa_key -C '' -N ''";
        $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Could not generate SSH2 RSA key.");
        }

        xCAT::MsgUtils->message('I', "Generating SSH2 DSA Key...");
        $cmd =
          "/usr/bin/ssh-keygen -t dsa -f /etc/xcat/hostkeys/ssh_host_dsa_key -C '' -N ''";
        $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Could not generate SSH2 DSA key.");
        }

        # copy the public keys to install directory
        $cmd =
          "/bin/cp /etc/xcat/hostkeys/*.pub $::INSTALLDIR/postscripts/hostkeys/.";
        $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "$cmd not successful.");
        }
        else
        {
            verbose("$cmd is successful");
        }
    }
    else
    {    # keys exist  and not a request to regenerate
          # so if private keys are in /install ( some migration)
          # move old hostkeys keys if they exist in /install, to the
          # new directory /etc/xcat/hostkeys & remove private keys from /install
        if (-f "$::INSTALLDIR/postscripts/hostkeys/ssh_host_rsa_key")
        {

            # copy all keys to /etc/xcat/hostkeys directory
            my $cmd =
              "/bin/cp -p $::INSTALLDIR/postscripts/hostkeys/* /etc/xcat/hostkeys/.";
            my $outref = xCAT::Utils->runcmd("$cmd", 0);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message('E', "$cmd not successful.");
            }

            # remove private keys from install dir, leave the public keys
            if (-f "$::INSTALLDIR/postscripts/hostkeys/ssh_host_dsa_key")
            {
                my $cmd =
                  "/bin/rm $::INSTALLDIR/postscripts/hostkeys/ssh_host_dsa_key";
                my $outref = xCAT::Utils->runcmd("$cmd", 0);
                if ($::RUNCMD_RC != 0)
                {
                    xCAT::MsgUtils->message('E', "$cmd not successful.");
                }
            }
            if (-f "$::INSTALLDIR/postscripts/hostkeys/ssh_host_key")
            {
                my $cmd = "/bin/rm $::INSTALLDIR/postscripts/hostkeys/ssh_host_key";
                my $outref = xCAT::Utils->runcmd("$cmd", 0);
                if ($::RUNCMD_RC != 0)
                {
                    xCAT::MsgUtils->message('E', "$cmd not successful.");
                }
            }
            if (-f "$::INSTALLDIR/postscripts/hostkeys/ssh_host_rsa_key")
            {
                my $cmd =
                  "/bin/rm $::INSTALLDIR/postscripts/hostkeys/ssh_host_rsa_key";
                my $outref = xCAT::Utils->runcmd("$cmd", 0);
                if ($::RUNCMD_RC != 0)
                {
                    xCAT::MsgUtils->message('E', "$cmd not successful.");
                }
            }
        }

        # so if no public key in  /install/postscripts/hostkeys
        # copy the /etc/xcat/hostkeys
        # public keys to /install/postscripts/hostkeys
        if (!(-f "$::INSTALLDIR/postscripts/hostkeys/ssh_host_rsa_key.pub"))
        {

            # rm any files
            my $cmd = "/bin/rm $::INSTALLDIR/postscripts/hostkeys/*";
            my $outref = xCAT::Utils->runcmd("$cmd", -1);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message('E',
                                   "$cmd not successful. Files may not exist.");
            }
            else
            {
                verbose("$cmd is successful");
            }

            # copy the public keys to install directory
            $cmd =
              "/bin/cp /etc/xcat/hostkeys/*.pub $::INSTALLDIR/postscripts/hostkeys/.";
            $outref = xCAT::Utils->runcmd("$cmd", 0);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message('E', "$cmd not successful.");
            }
            else
            {
                verbose("$cmd is successful");
            }
        }
    }
}

# is_lsb_ubuntu return value indicates whether system appears to be Ubuntu.
# Using required /etc/lsb-release file, instead of optional lsb_release command.

sub is_lsb_ubuntu
{
    if (open(my $relfile, "<", "/etc/lsb-release")) {
        my @text = <$relfile>;
        close($relfile);
        chomp(@text);
        my $distrib_id = '';

        foreach (@text) {
            if ( $_ =~ /^\s*DISTRIB_ID=(.*)$/ ) {
                $distrib_id = $1;                   # last DISTRIB_ID value in file used
            }
        }

        if ( $distrib_id =~ /^(Ubuntu|"Ubuntu")\s*$/ ) {
            return 1;                               # return "true"
        }
    }

    return 0;                   # return "false"
}

# on Ubuntu need to painstakingly compare /etc/localtime with files under
# /usr/share/zoneinfo since /etc/localtime # isn't always a symbolic link
sub discover_timezone_ubuntu
{
	my $localtime = "/etc/localtime";
	my $zoneinfo = "/usr/share/zoneinfo";

	my $zone_result = `find $zoneinfo -type f -exec cmp -s $localtime {} \\; -print | grep -v posix | grep -v SystemV`;

	my @zones = split /\n/, $zone_result;

	$zones[0] =~ s/$zoneinfo\///;

	return $zones[0];
}

#-----------------------------------------------------------------------------

=head3    initDB 
	
    Will initialize the DB if it does not already exist,  also updates with
	new data needed or database changes during xCAT update install.

=cut

#-----------------------------------------------------------------------------

sub initDB

{

    my $hname = `hostname`;
    chomp $hname;

    # some values common to both AIX & Linux
    my $xcatport   = "3001";
    my $xcatiport  = "3002";
    my $tftpdir    = "$::TFTPDIR";
    my $installdir = "$::INSTALLDIR";
    my $master;
    $master  = xCAT::NetworkUtils->getipaddr($hname);
    if (!$master) {
        xCAT::MsgUtils->message("E", "Hostname resolution for $hname failed.");
        $master = "NORESOLUTION";
    }
    # get forwarders which are the nameserver entries in /etc/resolv.conf
    # don't use if the address is this machine (Management Node)
    my $forwarders;
    # find out the names for the Management Node
    my @MNnodeinfo   = xCAT::Utils->determinehostname;
    my $MNnodename   = pop @MNnodeinfo;                  # hostname
    my @MNnodeipaddr = @MNnodeinfo;                      # ipaddresses

    my @names; 
    my @tmpnames =
    xCAT::Utils->runcmd(
       "/bin/grep ^[^#]*nameserver /etc/resolv.conf | awk '{print \$2}'", -1);
    foreach my $ip (@tmpnames) {
      if (!grep(/$ip/, @MNnodeipaddr))
      {     # if not the MN
         push @names,$ip;  # add it as a forwarder
      }
    }
    if (@names)
    {
       $forwarders     = join(',', @names);
    }
 
    # for policy table
    # get hostname from the /etc/xcat/cert/server-cert.pem
    my $MNname;
    if ( -e ("/etc/xcat/cert/server-cert.pem")) {
      my  $cmd ="grep Subject /etc/xcat/cert/server-cert.pem";
      my $result = xCAT::Utils->runcmd($cmd, 0);
      if ($::RUNCMD_RC != 0)
      {
        xCAT::MsgUtils->message("E", "Error from $cmd.\n MN policy not created.");
        
      }
      (my $subject,my $mname) = split /CN=/ , $result;
      ($MNname, my $endstuff) = split /Subject/, $mname;
       $MNname =~ s/\s*//g;
    }

    # set value based on OS
    my ($domain, $timezone);
    if ($::osname eq 'AIX')
    {
        my ($name, $rest) = split('\.', $hname);
        if ($rest)
        {
            ($domain = $hname) =~ s/^.*?\.//;
        }
        else
        {
            $domain = "";
        }

        $timezone = $ENV{'TZ'};
    }
    else    # linux
    {
        $domain = `hostname -d`;
        my $tz;
        if (-f "/etc/redhat-release")
        {

            # on Redhat look for "ZONE"
            $tz =
              `grep ^ZONE /etc/sysconfig/clock|cut -d= -f 2|sed -e 's/"//g'`;
        }
        elsif ( is_lsb_ubuntu() )
        {
            $tz = discover_timezone_ubuntu;
        }
        else
        {

            # on SuSE look for "TIMEZONE"
            $tz =
              `grep ^TIMEZONE /etc/sysconfig/clock|cut -d= -f 2|sed -e 's/"//g'`;
        }
        $timezone = $tz;
    }

    chomp $timezone;
    chomp $master;
    chomp $domain;

    # create basic site definition, if they do not exist reset request
    if (   ((!-r "/etc/xcat/site.sqlite") && (!-r "/etc/xcat/cfgloc"))
        || $::FORCE
        || $::initDB)
    {
        my $chtabcmds;
        my $confdir = "/etc/xcat";
        my $syncdir = "/var/xcat/syncfiles";
        $chtabcmds = "$::XCATROOT/sbin/chtab key=blademaxp site.value=64;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=domain site.value=$domain;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=fsptimeout site.value=0;";
        $chtabcmds .=
          "$::XCATROOT/sbin/chtab key=installdir site.value=$installdir;";
        if ($::osname eq 'Linux')
        {
            $chtabcmds .= "$::XCATROOT/sbin/chtab key=ipmimaxp site.value=64;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab key=ipmiretries site.value=3;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab key=ipmitimeout site.value=2;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab key=consoleondemand site.value=no;";
        }
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=master site.value=$master;";
        if ($forwarders) {
          $chtabcmds .= "$::XCATROOT/sbin/chtab key=forwarders site.value=$forwarders;";
        }
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=nameservers site.value=$master;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=maxssh site.value=8;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=ppcmaxp site.value=64;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=ppcretry site.value=3;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=ppctimeout site.value=0;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=powerinterval site.value=0;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=syspowerinterval site.value=0;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=sharedtftp site.value=1;";
        $chtabcmds .=
          "$::XCATROOT/sbin/chtab key=SNsyncfiledir site.value=$syncdir;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=tftpdir site.value=$tftpdir;";
        $chtabcmds .=
          "$::XCATROOT/sbin/chtab key=xcatdport site.value=$xcatport;";
        $chtabcmds .=
          "$::XCATROOT/sbin/chtab key=xcatiport site.value=$xcatiport;";
        $chtabcmds .=
          "$::XCATROOT/sbin/chtab key=xcatconfdir site.value=$confdir;";
        $chtabcmds .=
          "$::XCATROOT/sbin/chtab key=timezone site.value=$timezone;";

        $chtabcmds .= "$::XCATROOT/sbin/chtab key=useNmapfromMN site.value=no;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=enableASMI site.value=no;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=db2installloc site.value=\/mntdb2;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=databaseloc site.value=\/var\/lib;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=sshbetweennodes site.value=ALLGROUPS;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=dnshandler site.value=ddns;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=vsftp site.value=n;";
        $chtabcmds .= "$::XCATROOT/sbin/chtab key=cleanupxcatpost site.value=no;";

        if ($::osname eq 'AIX')
        {
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab key=useSSHonAIX site.value=yes;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab key=useNFSv4onAIX site.value=no;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab key=consoleondemand site.value=yes;";
        }

        my $outref = xCAT::Utils->runcmd("$chtabcmds", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Could not create site definition.");
        }
        else
        {
            verbose("Updated cluster site definition.");
        }
    }

    # create default postscript list in postscripts table
    # if it does not exist, or request reset
    # If otherpkgs does not exist, then put otherpkgs
    # in the postbootscripts attribute
    # else leave it where it is

    if (   ((!-r "/etc/xcat/postscripts.sqlite") && (!-r "/etc/xcat/cfgloc"))
        || $::FORCE
        || $::initDB)
    {

        # check to see if otherpkgs in the postscripts table
        # if it is do not change it, otherwise put in postbootscripts
        #  0 = does not exist
        #  1 = exists in postscripts
        #  2 = exists in postbootscripts
        my $otherpkgsexist     = &checkotherpkgs;
        my $otherpkgsprocessed = 0;

        my $chtabcmds = "";

        # if otherpkgs does not exist or we are initializing the DB
        # put in postbootscripts
        if (($otherpkgsexist == 0) || ($::initDB))
        {
            $chtabcmds =
              "$::XCATROOT/sbin/chtab node=xcatdefaults postscripts.postbootscripts='otherpkgs';";
            $otherpkgsprocessed = 1;

        }
        if ($::osname eq 'AIX')
        {

            # if already processed otherpkgs or it is in postbootscripts
            # don't put in postscripts, else put in postscripts
            if (($otherpkgsprocessed == 1) || ($otherpkgsexist == 2))
            {
                $chtabcmds .=
                  "$::XCATROOT/sbin/chtab node=xcatdefaults postscripts.postscripts='syslog,aixremoteshell,syncfiles';";
            }
            else
            {    #  put otherpkgs in postscripts
                $chtabcmds .=
                  "$::XCATROOT/sbin/chtab node=xcatdefaults postscripts.postscripts='syslog,aixremoteshell,otherpkgs,syncfiles';";
            }
            $chtabcmds .=
               "$::XCATROOT/sbin/chtab node=service postscripts.postscripts='' postscripts.postbootscripts='servicenode'";

        }
        else     # linux
        {

            # if already processed otherpkgs or it is in postbootscripts
            # don't put in postscripts, else put in postscripts
            if (($otherpkgsprocessed == 1) || ($otherpkgsexist == 2))
            {
                $chtabcmds .=
                  "$::XCATROOT/sbin/chtab node=xcatdefaults postscripts.postscripts='syslog,remoteshell,syncfiles';";
            }
            else
            {    # put otherpkgs in postscripts attr
                $chtabcmds .=
                  "$::XCATROOT/sbin/chtab node=xcatdefaults postscripts.postscripts='syslog,remoteshell,otherpkgs,syncfiles';";
            }
            $chtabcmds .=
               "$::XCATROOT/sbin/chtab node=service postscripts.postscripts='servicenode'";
        }

        my $outref = xCAT::Utils->runcmd("$chtabcmds", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',
                                    "Could not create postscripts definition.");
        }
        else
        {
            verbose("Created postscripts definition.");
        }
    }

    # create or reset basic policy table definitions
    if (   ((!-r "/etc/xcat/policy.sqlite") && (!-r "/etc/xcat/cfgloc"))
        || $::FORCE
        || $::initDB)
    {
        my $chtabcmds;
        if ($::osname eq 'AIX')
        {
            $chtabcmds =
              "$::XCATROOT/sbin/chtab priority=1 policy.name=root policy.rule=allow;";
            if (defined($MNname)){
              $chtabcmds .=
                "$::XCATROOT/sbin/chtab priority=1.2 policy.name=$MNname policy.rule=trusted;";
            } 
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=4.4 policy.commands=getpostscript policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=4.5 policy.commands=getcredentials policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=4.6 policy.commands=syncfiles policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=2.3 policy.commands=lsxcatd policy.rule=allow;";
        }
        else    # linux
        {
            $chtabcmds =
              "$::XCATROOT/sbin/chtab priority=1 policy.name=root policy.rule=allow;";
            if (defined($MNname)){
              $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=1.2 policy.name=$MNname policy.rule=trusted;";
            }
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=2 policy.commands=getbmcconfig policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=2.3 policy.commands=lsxcatd policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=3 policy.commands=nextdestiny policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=4 policy.commands=getdestiny policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=4.4 policy.commands=getpostscript policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=4.5 policy.commands=getcredentials policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=4.6 policy.commands=syncfiles policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=4.7 policy.commands=litefile policy.rule=allow;";
            $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=4.8 policy.commands=litetree policy.rule=allow;";
        }
        my $outref = xCAT::Utils->runcmd("$chtabcmds", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Could not create policy definition.");
        }
        else
        {
            verbose("Created policy definition.");
        }
    }

    # update install processing
    # adding otherpkgs and syncfiles new postscripts for migration
    if ($::UPDATEINSTALL)
    {
        # setup Management Node policy to trusted
        my $chtabcmds;
        $chtabcmds =
          "$::XCATROOT/sbin/chtab priority=1.2 policy.name=$MNname policy.rule=trusted;";
        $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=2.3 policy.commands=lsxcatd policy.rule=allow;";
        my $outref = xCAT::Utils->runcmd("$chtabcmds", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',
                            "Could not update policy.name=$hname rule.");
        }
        else
        {
            verbose("Updated policy definition for MN.");
        }
        # add statelite policies on update for Linux 
        if ($::osname eq 'Linux') {
          $chtabcmds =
              "$::XCATROOT/sbin/chtab priority=4.7 policy.commands=litefile policy.rule=allow;";
          $chtabcmds .=
              "$::XCATROOT/sbin/chtab priority=4.8 policy.commands=litetree policy.rule=allow;";
          my $outref = xCAT::Utils->runcmd("$chtabcmds", 0);
           if ($::RUNCMD_RC != 0)
          {
            xCAT::MsgUtils->message('E', "Could not create statelite policy.");
          }
          else
          {
            verbose("Created statelite policy definition.");
          }
        }

        # check to see if otherpkgs is in the postscripts table
        # if it is do not change it, otherwise put in postbootscripts
        #  0 = does not exist
        #  1 = exists in postscripts
        #  2 = exists in postbootscripts
        my $otherpkgsexist = &checkotherpkgs;
        $chtabcmds ="";
        if (($otherpkgsexist == 1) || ($otherpkgsexist == 2)) {
            # otherpkgs already in postscripts or in postbootscripts
            $chtabcmds = "$::XCATROOT/sbin/chtab node=xcatdefaults postscripts.postscripts+='syncfiles'";
        }
        else
        {   # else otherpkgs does not exist
            #  put in postbootscripts
            $chtabcmds = "$::XCATROOT/sbin/chtab node=xcatdefaults postscripts.postbootscripts+='otherpkgs';";
            $chtabcmds .= "$::XCATROOT/sbin/chtab node=xcatdefaults postscripts.postscripts+='syncfiles'";
        }

        if ($chtabcmds ne "") {
            my $outref = xCAT::Utils->runcmd("$chtabcmds", 0);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message('E',
                                    "Could not update postscripts definition.");
            }
            else
            {
                verbose("Updated postscripts definition.");
            }
        }

        # remove any xcatdefaults node in nodelist
        # leave to cleanup from previous bug
        my $rmdefault="$::XCATROOT/sbin/chtab -d node=xcatdefaults nodelist";
        $outref = xCAT::Utils->runcmd("$rmdefault", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',"Could not remove xcatdefaults.");
        }
        else
        {
            verbose("Removed xcatdefaults.");
        }

        # switch from bind.pm to ddns.pm
        # give a warning message for the first time
        my $cmds = "$::XCATROOT/sbin/tabdump site|grep dnshandler";
        $outref = xCAT::Utils->runcmd("$cmds", -1);
        if ($::RUNCMD_RC != 0)
        {
            # set site.dnshandler
            $cmds = "$::XCATROOT/sbin/chtab key=dnshandler site.value=ddns;";
            $outref = xCAT::Utils->runcmd("$cmds", 0);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message('E',"Could not set ddns as dnshandler.");
            }
        }

   } 
   # remove xcatserver,xcatclient
   # from the postscripts. They are now called by servicenode
   &cleanupPSTable;
   
}    # end initial DB install setup

#-----------------------------------------------------------------------------

=head3    check for otherpkgs 
	
    Check to see if other pkgs exists in postscripts table.
	If it does not we will be putting it in postbootscripts
          return exist_flag

	  exist_flag = 0 does not exist
	  exist_flag = 1 exists  in postscripts
	  exist_flag = 2 exists in postbootscripts

=cut

#-----------------------------------------------------------------------------

sub checkotherpkgs
{
    my $otherpkgsexist = 0;
    my $postscriptstab  = xCAT::Table->new('postscripts');
    my $attr            = "xcatdefaults";
    my @values;
    if ($postscriptstab)
    {
        my $ref = $postscriptstab->getAttribs({node => $attr}, 'postscripts');
        if ($ref)
        {
            @values = $ref->{postscripts};
            if (grep(/otherpkgs/, @values))
            {
                $otherpkgsexist = 1;
            }
        }
        if ($otherpkgsexist == 0)
        {

            # check postbootscripts
            my $ref = $postscriptstab->getAttribs({node => $attr}, 'postbootscripts');
            if ($ref)
            {
                @values = $ref->{postscripts};
                if (grep(/otherpkgs/, @values))
                {
                    $otherpkgsexist = 2;
                }
            }
        }
    }
    return $otherpkgsexist;
}

#-----------------------------------------------------------------------------

=head3    genCredentials 
	
    Will generate the xCAT credential,  if new install or requested to 
	regenerate.

=cut

#-----------------------------------------------------------------------------

sub genCredentials

{
    my $hname = `hostname`;
    chomp $hname;
    if ((!-d "/etc/xcat/ca") || $::FORCE || $::genCredentials)
    {
        xCAT::MsgUtils->message(
            'I',
            "\nSetting up basic certificates.  Respond with a \'y\' when prompted.\n"
            );
        my $cmd =
          "echo 'y\ny\ny\ny' |$::XCATROOT/share/xcat/scripts/setup-xcat-ca.sh 'xCAT CA'";
        verbose("Running $cmd");
        my $rc = system($cmd);
        if ($rc >> 8)
        {
            xCAT::MsgUtils->message('E',
                          "Could not create xCAT certificate in /etc/xcat/ca.");
        }
        else
        {
            xCAT::MsgUtils->message('I', "Created xCAT certificate.");
        }
    }

    #  copy to postscript directory  just non-sensitive files
    my $cmd    = "/bin/rm -rf $::INSTALLDIR/postscripts/ca >/dev/null 2>&1";
    my $outref = xCAT::Utils->runcmd("$cmd", 0);
    $cmd    = "/bin/mkdir -m 755 -p $::INSTALLDIR/postscripts/ca";
    $outref = xCAT::Utils->runcmd("$cmd", 0);
    if ($::RUNCMD_RC != 0)
    {
        xCAT::MsgUtils->message('E',
                       "Could not create $::INSTALLDIR/postscripts/ca directory.");
    }
    else
    {
        verbose("Created $::INSTALLDIR/postscripts/ca directory.");
    }
    $cmd = "/bin/cp -p /etc/xcat/ca/ca-cert.pem $::INSTALLDIR/postscripts/ca/ca-cert.pem";
    $outref = xCAT::Utils->runcmd("$cmd", 0);
    if ($::RUNCMD_RC != 0)
    {
        xCAT::MsgUtils->message(
            'E',
            "$cmd failed"
            );
    }
    else
    {
        verbose  "$cmd succeeded.";
    }

    if ((!-d "/etc/xcat/cert") || $::FORCE || $::genCredentials)
    {
        my $cmd =
          "echo 'y\ny\ny\ny' |$::XCATROOT/share/xcat/scripts/setup-server-cert.sh $hname";
        verbose("Running $cmd");
        my $rc = system($cmd);
        if ($rc >> 8)
        {
            xCAT::MsgUtils->message('E',
                        "Could not create xCAT certificate in /etc/xcat/cert.");
        }
        else
        {
         if ($::genCredentials) { # if just generating new credentials
            xCAT::MsgUtils->message('I', "Created xCAT certificate.");
            my $chtabcmds =
              "$::XCATROOT/sbin/chtab priority=1.2 policy.name=$hname policy.rule=trusted;";
            my $outref = xCAT::Utils->runcmd("$chtabcmds", 0);
            if ($::RUNCMD_RC != 0)
            {
              xCAT::MsgUtils->message('E', "Could not create policy definition.$chtabcmds.");
            }
         }
        }
    }

    #  copy to postscript directory, no longer use cert directory
    $cmd    = "/bin/rm -rf $::INSTALLDIR/postscripts/cert >/dev/null 2>&1";
    $outref = xCAT::Utils->runcmd("$cmd", 0);

    if ((!-r "$::root/.xcat/client-key.pem") || $::FORCE || $::genCredentials)
    {

        my $cmd =
          "echo 'y\ny\ny\ny' |$::XCATROOT/share/xcat/scripts/setup-local-client.sh root";
        verbose("Running $cmd");
        my $rc = system($cmd);
        if ($rc >> 8)
        {
            xCAT::MsgUtils->message('E',
                 "Could not create xCAT certificate in /.xcat/client-key.pem.");
        }
        else
        {
            xCAT::MsgUtils->message('I', "Created xCAT certificate.");
        }
    }

    #  copy to postscript directory
    $cmd    = "/bin/rm -rf $::INSTALLDIR/postscripts/_xcat >/dev/null 2>&1";
    $outref = xCAT::Utils->runcmd("$cmd", 0);
    $cmd    = "/bin/mkdir -m 755 -p $::INSTALLDIR/postscripts/_xcat";
    $outref = xCAT::Utils->runcmd("$cmd", 0);
    if ($::RUNCMD_RC != 0)
    {
        xCAT::MsgUtils->message('E',
                      "Could not create $::INSTALLDIR/postscripts/_xcat directory.");
    }
    else
    {
        verbose("Created $::INSTALLDIR/postscripts/_xcat directory.");
    }
    $cmd = "/bin/cp -p $::root/.xcat/ca.pem $::INSTALLDIR/postscripts/_xcat/ca.pem";
    $outref = xCAT::Utils->runcmd("$cmd", 0);
    if ($::RUNCMD_RC != 0)
    {
        xCAT::MsgUtils->message(
            'E',
            "Could not copy $::root/.xcat/ca.pem to  $::INSTALLDIR/postscripts/_xcat directory."
            );
    }
    else
    {
        verbose  "Copied $::root/.xcat/ca.pem to $::INSTALLDIR/postscripts/_xcat directory.";
    }
}

#-----------------------------------------------------------------------------

=head3    setupAIXIPMITool 
       
     Set AIX IPMI Tool 
 
=cut

#-----------------------------------------------------------------------------

sub setupAIXIPMITool

{
    if (!-f "/usr/bin/ipmitool")
    {
        my $cmd = "ln -sf /opt/freeware/bin/ipmitool /usr/bin/ipmitool";
       my  $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message(
                'E',
                "Could not ln -sf /opt/freeware/bin/ipmitool /usr/bin/ipmitool."
                );
        }
        else
        {
            verbose("ln -sf /opt/freeware/bin/ipmitool /usr/bin/ipmitool.");
        }
    }
}

#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------

=head3    setupAIXexports 
	
    Set AIX exports 

=cut

#-----------------------------------------------------------------------------

sub setupAIXexports

{
    # check if /install/postscripts is exported
    my $lsnfsexpcmd =
      "/usr/sbin/lsnfsexp -d $::INSTALLDIR/postscripts 2>&1";
    my $outref = xCAT::Utils->runcmd("$lsnfsexpcmd", -1);
    if (($::RUNCMD_RC != 0) || ($outref !~ /-vers=3:4/))
    {

        # if not exported for both NFS version 3 and version 4,
        # make sure it is exported with -vers=3:4
        my $rmnfsexpcmd = "/usr/sbin/rmnfsexp -d $::INSTALLDIR/postscripts 2>&1";
        xCAT::Utils->runcmd("$rmnfsexpcmd", -1);

        my $mknfsexpcmd =
          "mknfsexp -d $::INSTALLDIR/postscripts '-B' -v '3,4' -t 'ro'";
        my $outref2 = xCAT::Utils->runcmd("$mknfsexpcmd", -1);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',
                                    "Could not export directory $::INSTALLDIR/postscripts.");
        }
    }
}

#-----------------------------------------------------------------------------

=head3    setupLinuxexports 
	
    Set Linux exports 

=cut

#-----------------------------------------------------------------------------

sub setupLinuxexports
{
    my $changed_exports = 0;

    #
    #  add tftpboot to /etc/exports - if needed
    #

    my $cmd = "/bin/cat /etc/exports | grep '$::TFTPDIR'";
    my $outref = xCAT::Utils->runcmd("$cmd", -1);
    if ($::RUNCMD_RC != 0)
    {

        # ok - then add this entry
        #SECURITY: this has potential for sharing private host/user keys
        my $cmd =
          "/bin/echo '$::TFTPDIR *(rw,no_root_squash,sync,no_subtree_check)' >> /etc/exports";

        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',
                                    "Could not update the /etc/exports file.");
        }
        else
        {
            verbose("Added $::TFTPDIR to the /etc/exports file.");
            $changed_exports++;
        }
    }

    #
    #  add /install to /etc/exports - if needed
    #

    $cmd = "/bin/cat /etc/exports | grep '$::INSTALLDIR'";
    $outref = xCAT::Utils->runcmd("$cmd", -1);
    if ($::RUNCMD_RC != 0)
    {

        # ok - then add this entry
        #SECURITY: this has potential for sharing private host/user keys
        my $cmd =
          "/bin/echo '$::INSTALLDIR *(rw,no_root_squash,sync,no_subtree_check)' >> /etc/exports";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',
                                    "Could not update the /etc/exports file.");
        }
        else
        {
            verbose("Added $::INSTALLDIR to the /etc/exports file.");
            $changed_exports++;
        }
    }

    if ($changed_exports)
    {

        # restart nfs
        my $cmd = "/sbin/service nfs restart";
        my $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Could not restart NFS.");
        }
        else
        {
            xCAT::MsgUtils->message('I', "NFS has been restarted.");
        }

        $cmd = "/sbin/chkconfig nfs on";
        $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Could not enable NFS.");
        }
        else
        {
            verbose("NFS has been enabled.");
        }
        $cmd = "/usr/sbin/exportfs -a";
        $outref = xCAT::Utils->runcmd("$cmd", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E', "Error with $cmd.");
        }
        else
        {
            verbose("Ran $cmd.");
        }
    }
}

#-----------------------------------------------------------------------------

=head3    mknb 
	
    creates a network boot root image on Linux 

=cut

#-----------------------------------------------------------------------------
sub mknb
{
    if ($::arch eq "x86_64" || $::arch eq "x86")
    {
        foreach my $ar (qw(x86 x86_64 ppc64))
        {
            my $cmd = "$::XCATROOT/sbin/mknb $ar";
            my $outref = xCAT::Utils->runcmd("$cmd", 0);
            if ($::RUNCMD_RC != 0)
            {
                xCAT::MsgUtils->message('E',
                          "The mknb $ar command returned error: $::RUNCMD_RC.");
            }
            else
            {
                xCAT::MsgUtils->message('I',
                                "The mknb $ar command completed successfully.");
            }
        }
    }

}

#-----------------------------------------------------------------------------

=head3    makenetworks 
	
     Runs makenetworks on AIX and Linux 

=cut

#-----------------------------------------------------------------------------
sub makenetworks
{

    # run makenetworks
    my $cmd = "$::XCATROOT/sbin/makenetworks";
    my $outref = xCAT::Utils->runcmd("$cmd", 0);
    if ($::RUNCMD_RC != 0)
    {
        verbose("The makenetworks command returned error: $::RUNCMD_RC");
    }
    else
    {
        verbose("The makenetworks command was run with no error.");
    }


}
#-----------------------------------------------------------------------------

=head3    setuphttp 
	
     initializes http  on Linux

=cut

#-----------------------------------------------------------------------------
sub setuphttp 
{

    my $cmd;
    # restart httpd
    if (-e "/etc/init.d/apache2")
    {    #for sles
        $cmd = "/etc/init.d/apache2 stop; /etc/init.d/apache2 start";
    }
    else
    {
        $cmd = "/etc/init.d/httpd stop; /etc/init.d/httpd start";
    }

    my $outref = xCAT::Utils->runcmd("$cmd", 0);
    if ($::RUNCMD_RC != 0)
    {
        xCAT::MsgUtils->message('E', "Could not restart httpd.");
    }
    else
    {
        xCAT::MsgUtils->message('I', "httpd has been restarted.");
    }

    # enable httpd
    if (-e "/etc/init.d/apache2")
    {    #for sles
        $cmd = "/sbin/chkconfig apache2 on";
    }
    else
    {
        $cmd = "/sbin/chkconfig httpd on";
    }
    $outref = xCAT::Utils->runcmd("$cmd", 0);
    if ($::RUNCMD_RC != 0)
    {
        xCAT::MsgUtils->message('E', "Could not enable httpd.");
    }
    else
    {
        verbose("httpd has been enabled.");
    }
}
#-----------------------------------------------------------------------------

=head3   cleanupPSTable 
	
   Any line in the postscripts table that has the following
   entry will have xcatserver,xcatclient remove because they
   are not called by servicenode

   ..."servicenode,xcatserver,xcatclient.."... 

=cut

#-----------------------------------------------------------------------------
sub cleanupPSTable 
{
 my $rc=0;
 my $tab;
 if ($tab = xCAT::Table->new("postscripts")) {
   my @tableentries = $tab->getAllAttribs('node','postscripts');
   foreach my $entry (@tableentries) {
     my $node=$entry->{'node'};
     my $pslist=$entry->{'postscripts'};
     if ($pslist) {
       my $servicenode=0;
       my $newpslist ="\"";
       my @ps= split(",", $pslist);    
       # now check is servicenode and xcatclient and/or xcatserver in the list
       foreach my $pscript (@ps) {
         if ($pscript =~ /^servicenode/i) { # found servicenode ps
            $newpslist .=$pscript;
            $newpslist .=",";
            $servicenode=1; 
         } else{  # no service node just put entry on new table
            if ($servicenode == 0) { 
               $newpslist .=$pscript;
               $newpslist .=",";
            } else { # servicenode found, do not keep xcatserver/xcatclient 
             if (($pscript =~ /^xcatserver/i) ||($pscript =~ /^xcatclient/i)) {
                   next;
               } else {
                 $newpslist .=$pscript;
                 $newpslist .=",";
               }
            }
         }
       }
       chop $newpslist;
       $newpslist .="\""; 
       my $chtabcmds .=
       "$::XCATROOT/sbin/chtab node=$node postscripts.postscripts=$newpslist;";
        my $outref = xCAT::Utils->runcmd("$chtabcmds", 0);
        if ($::RUNCMD_RC != 0)
        {
            xCAT::MsgUtils->message('E',
                 "Could not modify postscripts definition for $node.");
        }
     } 
   }
 }
 else
 {
      xCAT::MsgUtils->message("E", " Could not open the postscripts table\n");
      return 1;
 }

 return $rc
}