Tuesday, December 23, 2014

Time mismatch in RHEL with windows v-sphere2012



Source : http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006427

Editing Kernel Configuration

Kernel command line parameters are specified in the /etc/lilo.conf or /boot/grub/grub.conf file, depending on your choice of boot loader.
  • For LILO, put the kernel command line parameters at the end of the append line.

    For example, if the append is similar to:

    append="resume=/dev/hda6 splash=silent"

    and you want to add clock=pmtmr divider=10, the updated text is:

    append="resume=/dev/hda6 splash=silent clock=pmtmr divider=10"

    Run the /sbin/lilo command after editing the lilo.conf file to make the changes take effect.
  • For GRUB, put the kernel command line parameters at the end of the kernel line.

    For example, if the kernel line is similar to:

    kernel /vmlinuz-2.6.18 ro root=/dev/hda2

    and you want to add clock=pmtmr divider=10, the updated text is:

    kernel /vmlinuz-2.6.18 ro root=/dev/hda2 clock=pmtmr divider=10


Example :

 [root@ibsvr ~]# ip a | grep eth0
2: eth0: mtu 1500 qdisc pfifo_fast qlen 1000
    inet 10.192.168.36/26 brd 10.192.168.63 scope global eth0

[root@ibsvr ~]# cat /etc/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You do not have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /, eg.
#          root (hd0,1)
#          kernel /boot/vmlinuz-version ro root=/dev/hda2
#          initrd /boot/initrd-version.img
#boot=/dev/hda
default=0
timeout=5
splashimage=(hd0,1)/boot/grub/splash.xpm.gz
hiddenmenu
title Enterprise Linux (2.6.18-164.el5)
        root (hd0,1)
        kernel /boot/vmlinuz-2.6.18-164.el5 ro root=LABEL=/ rhgb quiet clock=pmtmr divider=10
        initrd /boot/initrd-2.6.18-164.el5.img

OR ,
(From Microsoft suggestion )

The specified parameters should be added to the end of kernel line in boot loader configuration, e.g. for GRUB:
~# cat /boot/grub/menu.lst
default=0
timeout=30

title CentOS (2.6.18-194.el5.x86_64)
   root (hd1,0)
   kernel /boot/vmlinuz-2.6.18-194.el5.x86_64 ro root=UUID=6b3f39b4-8749-4b3b-a873-d8c5a96e2f45 divider=10 nohpet notsc
   initrd /boot/initrd-2.6.18-194.el5.x86_64.img

Microsoft Link :

 > http://support.microsoft.com/kb/2711608
>  http://support.microsoft.com/kb/918461
>  http://kb.sp.parallels.com/en/114810

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