Jun 07
I found out that a large part of centos servers were out of sync with the current time.
So I fixed them.
First get the current date and time from a time server:
rdate -s tick.uh.edu
Then type
/sbin/hwclock –systohc
This sets the system time as a ‘permanent’ clock so that the time will be correct next time you reboot.
You can also use NTP (Network Time protocol) but I haven’t looked into (yet).
The NTP uses a network of time server to automatically sync your system time with the time server on a regular base.
September 3rd, 2009 at 09:31
rdate is depreciated in favor of ntp. pick a 2 or more servers from the list at: http://tf.nist.gov/tf-cgi/servers.cgi (or whatever your country’s standards body recommends) and edit /etc/ntp.conf
a basic configuration will simply include the following lines:
server [ip address 1]
server [ip address 2]
then start ntp using /etc/init.d/ntp start
or use “chkconfig ntp on” to set it to start on boot.
If you have several servers, you should consider setting up a single machine to sync from NIST, and then sync the rest of your machines to that one.