To Check the hardware clock
#hwclock
To check the system clock
#timedatectl
To set the ntp on
#timedatectl set-ntp yes
To set the time
#timedatectl set-time HH:MM:SS
To start and enable ntpd services
#sudo systemctl start ntpd
#sudo systemctl enable ntpd
To set time to ntp server
#ntpdate -u clock.ncbs.res.in && hwclock -w
