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(Created page with " == Timezone set on Linux == Timezone tells your system where you are in the world depending on your exact location on this planet with GMT-/+<nowiki><time> format.</nowiki> On most Linux, <code>/etc/timezone</code> is a text-based representation of what timezone you are in. <code>/etc/localtime</code> is a binary representation of the exact rules for calculating the time relative to UNIX time by a symbolic link from <code>/etc/localtime</code> to a file in the <code...") |
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<code>/etc/localtime</code> is a binary representation of the exact rules for calculating the time relative to UNIX time by a symbolic link from <code>/etc/localtime</code> to a file in the <code>/usr/share/zoneinfo</code> directory. | <code>/etc/localtime</code> is a binary representation of the exact rules for calculating the time relative to UNIX time by a symbolic link from <code>/etc/localtime</code> to a file in the <code>/usr/share/zoneinfo</code> directory. | ||
instead of manually chaing those file, timedatectl command change your timezone much easily.<syntaxhighlight lang="bash"> | |||
# Get available timezone list and it's name | |||
$ timedatectl list-timezones | grep -i seoul | |||
Asia/Seoul | |||
# Set system timezone to Asia/Seoul, for example. | # Set system timezone to Asia/Seoul, for example. | ||
$ sudo timedatectl set-timezone Asia/Seoul | $ sudo timedatectl set-timezone Asia/Seoul | ||
$ ls -al /etc/timezone | $ ls -al /etc/timezone | ||
Latest revision as of 08:11, 26 May 2025
Timezone set on Linux
Timezone tells your system where you are in the world depending on your exact location on this planet with GMT-/+<time> format.
On most Linux,
/etc/timezone is a text-based representation of what timezone you are in.
/etc/localtime is a binary representation of the exact rules for calculating the time relative to UNIX time by a symbolic link from /etc/localtime to a file in the /usr/share/zoneinfo directory.
instead of manually chaing those file, timedatectl command change your timezone much easily.
# Get available timezone list and it's name
$ timedatectl list-timezones | grep -i seoul
Asia/Seoul
# Set system timezone to Asia/Seoul, for example.
$ sudo timedatectl set-timezone Asia/Seoul
$ ls -al /etc/timezone
-rw-r--r-- 1 root root 11 May 30 10:51 /etc/timezone
$ cat /etc/timezone
Asia/Seoul
$ ls -al /etc/localtime
lrwxrwxrwx 1 root root 32 May 30 10:51 /etc/localtime -> ../usr/share/zoneinfo/Asia/Seoul
systemd-timesyncd
systemd uses /etc/systemd/timesyncd.conf file for NTP time sync.
FallbackNTP points to the NTP servers, for example, FallbackNTP=time.nist.gov
# changing configuration file needs to restart systemd-timesyncd service
# timedatectl show-timesync command to verify current status.
#To enable the network time synchronization
%sudo timedatectl set-ntp true
#To disable the network time sync
$sudo timedatectl set-ntp false