How to setup chrony

chrony is an implementation of the Network Time Protocol and helps to keep your computer's time synchronized with NTP.

🐣 1. Installation

Install chrony.

sudo apt-get install chrony

Update the config file located in /etc/chrony/chrony.conf with the following

pool time.google.com iburst minpoll 1 maxpoll 2 maxsources 3
pool ntp.ubuntu.com iburst minpoll 1 maxpoll 2 maxsources 3
#pool time.nist.giv iburst minpoll 1 maxpoll 2 maxsources 3
pool us.pool.ntp.org iburst minpoll 1 maxpoll 2 maxsources 3
# This directive specify the location of the file containing ID/key pairs for
# NTP authentication.
keyfile /etc/chrony/chrony.keys
# This directive specify the file into which chronyd will store the rate
# information.
driftfile /var/lib/chrony/chrony.drift
# Uncomment the following line to turn logging on.
#log tracking measurements statistics
# Log files location.
logdir /var/log/chrony
# Stop bad estimates upsetting machine clock.
maxupdateskew 5.0
# This directive enables kernel synchronisation (every 11 minutes) of the
# real-time clock. Note that it can’t be used along with the 'rtcfile' directive.
rtcsync
# Step the system clock instead of slewing it if the adjustment is larger than
# one second, but only in the first three clock updates.
makestep 0.1 -1

Restart chrony in order for config change to take effect.

systemctl restart chronyd.service

🤖 2. Helpful Commands

To see the source of synchronization data.

chronyc sources

To view the current status of chrony.

chronyc tracking