sudo timedatectl set-ntp true

timedatectl set-timezone UTC

  • Both time and date :

date -s "19 APR 2012 11:14:00"

  • Only date :

date +%Y%m%d -s "20120418"

  • Only time :

date +%T -s "11:14:00"

  • To set manually :
# timedatectl set-time "YYYY-MM-DD HH:MM:SS"
# timedatectl set-time "2013-01-08 18:18:18"
# timedatectl status

If the local time and UTC is different try with command line below: timedatectl set-timezone UTC

  • To set automatically using ntp:
# pacman -S ntp
# ntpd -qg

then Check using timedatectl status. When using ntpd -qg your system must be connected on internet, to get time date from server.

  • Setting Hardware Clock :

The hardware clock is the clock that runs in you PC hardware even if you disconnect it from the main power supply. This is because it has a lithium battery in the modern computers and another type of battery in the old ones.

We’ll see differences between hardware clock and system clock.

hardware clock… hwclock --show Will output something like this: (Thu 19 Apr 2012 03:23:05 PM BOT -0.785086 seconds)

system clock… date Will output something like this: (Thu Apr 19 15:26:41 BOT 2012)

  • To set the hardware clock to local time:

hwclock --set --date="2012-04-19 16:45:05" --localtime

  • If you want to set it to UTC time use:

hwclock --set --date="2011-04-19 20:45:05" --utc

  • To set the timezone of your system clock do the following:

cp /usr/share/zoneinfo/America/La_Paz /etc/localtime

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