Linux: timedatectl

List current timezone:

timedatectl

Show available timezones:

timedatectl list-timezones

Set time

timedatectl set-time "13:28"

timedatectl set-time "2020-08-21"

Set timezone

timedatectl set-timezone 'America/Sao_Paulo'

Turn off automatic clock sync:

timedatectl set-ntp 0

Enable NTP server

timedatectl set-ntp true

List enabled NTP servers:

timedatectl show-timesync –all

Add NTP server address:

Edit the line below in /etc/systemd/timesyncd.conf:

NTP=pool.ntp.org 0.south-america.pool.ntp.org

Restart timesyncd:

systemctl restart systemd-timesyncd