defect 3539473: disable the xcatdebug to be run on aix

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/branches/2.7@13802 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-client/pods/man8/xcatdebug.8.pod

@@ -1,6 +1,6 @@
 =head1 NAME
 
-B<xcatdebug> - Enable or disable the trace facilities for xCAT.
+B<xcatdebug> - Enable or disable the trace facilities for xCAT. (Only supports Linux Operating System)
 
 B<xcatdebug> { [B<-f enable|disable> [B<-c configuration file | subroutine list>]] | [ B<-d enable |disable>]}
 

xCAT-server/sbin/xcatdebug

@@ -49,6 +49,11 @@ if (
     exit 1;
 }
 
+if ($^O !~ /^linux/i) {
+  print "xcatdebug command only supports Linux Operating System.\n";
+  exit 1;
+}
+
 if (!($::FUNC || $::DEBUG)) {
   print "$usage";
   exit 1;