Objective 107.3: Localization and Internationalization
The suite of programs that comes with the Network Time Protocol (NTP) allow you to keep your system and hardware clocks in sync with accurate time servers over the Internet.
ntpd –q will update a system clock against an NTP server and then exit.
Hardware clocks are configured to reflect either local time or Universal Coordinated Time (UTC) plus a time zone offset. The command hwclock can be used to manipulate a hardware clock from within Linux.
The file /etc/localtime should be a symbolic link to the time zone configuration file appropriate for your locale. For example, in the central United States:
ls –l /etc/localtimelrwxrwxrwx 1 root root 30 Sep 12 13:56 /etc/localtime \ -> /usr/share/zoneinfo/US/Central
The command tzselect can be used to change your system’s time zone.