first on edit your boot.conf:
default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title Fedora Core (2.6.17-1.2187_FC5) root (hd0,0) kernel /vmlinuz-2.6.17-1.2187_FC5 ro root=/dev/VolGroup00/LogVol00 clock=pit nosmp noapic nolapic initrd /initrd-2.6.17-1.2187_FC5.img
then check the configuration on VMware tools to time synchronization Vcenter or direct on vmx file from Virtual Machine
tools.syncTime = "TRUE"
on 64bit Systems is needed to install the ntp-service
yum install ntp
Check and Disable the cpuspeed service:
chkconfig --level 12345 cpuspeed off
Since the vmware’s guest timeclock is not reliable we have to disable ntp from using it as a backup. If you do not do this ntp will not function. Comment out the below lines in /etc/ntp.conf
#server 127.127.1.0 # local clock #fudge 127.127.1.0 stratum 10
Before starting the ntp service we need to get the system clock within 1 second of the ntp time source. Run ntpdate a few times until the offset settles.
ntpdate pool.ntp.org
Start ntpd and configure it to run at system startup.
service ntpd start chkconfig ntpd on
Wait 10-15 min and check the server reach which should be 377.
ntpq -p
Also check the stratum this should be 5 or below.
ntpq -c rv | grep stratum
service ntpd start chkconfig ntpd on