diff --git a/xCAT-server/share/xcat/netboot/rh/genimage b/xCAT-server/share/xcat/netboot/rh/genimage
index 0c4bf571c..585d02ccf 100755
--- a/xCAT-server/share/xcat/netboot/rh/genimage
+++ b/xCAT-server/share/xcat/netboot/rh/genimage
@@ -339,6 +339,9 @@ unless ($onlyinitrd) {
               }
           }
 
+          # mount /proc file system since several packages need it.
+          print "mount /proc file system\nchroot $rootimg_dir /bin/mount -t proc proc /proc\n";
+          system("chroot $rootimg_dir /bin/mount -t proc proc /proc");
 
           # install extra packages
           my $yumcmd_base = $yumcmd;
@@ -363,6 +366,9 @@ unless ($onlyinitrd) {
 	      print "No Packages marked for install\n";
           }
 
+          # umount /proc file system that just mounted
+          print "umount /proc file system\nchroot $rootimg_dir /bin/umount /proc\n";
+          system("chroot $rootimg_dir /bin/umount /proc");
 	
           # remove the packages that are specified in the otherpkgs.list files with leading '--'
           if (exists ($extra_hash{$pass}{'POST_REMOVE'})) {