Linux Administration - Time

Date
Commands > date Displays current date/time.

> date 103123302007 Sets the current time 11:30pm on October 31, 2007.

> hwclock --systohc Synchronize hardware clock to the software clock.

> hwclock --hctosys Synchronize software clock to the hardware clock.

NTP
Files /etc/ntp.conf - configuration file /var/lib/ntp - ntp files /var/lib/ntp/ntp.drift - file used to correct time drifting
Commands > /etc/init.d/ntpd restart Restart ntp daemon via SysV script.

> ntpq Ntp status program.

> ntpdate [host] (deprecated) > ntpd -g After the main NTP servers has been configured, point other clients in network to them.

Timezones
Files /etc/localtime - local time zone information /etc/timezone - sometimes is also called this /usr/share/zoneinfo - timezone files