Show system time:
Show hardware time:
sudo hwclock -r
Change system time to match hardware time:
sudo hwclock --hctosys
Change hardware time to match system time:
sudo hwclock --systohc
Manually set the hardware time to a specified date:
sudo hwclock --set --date="8/25/19 13:30:00"
Computers started counting time on January 1st, 1970, and added one second-per-second. If your clock shows you’re in the 70’s, it’s reset to the start.
Track the time in Unix-time:
Network Time Providers
Servers which take their time from an observatory we call Stratum 1 servers. Servers which takes their time from Stratum n servers are Stratum n+1 servers.
Install ntp with:
sudo apt-get install -y ntp
The shell command for this is
ntpq. Monitor the service providers using: