NTP

	Linux Mint
sudo apt-get install ntpdate

To know if NTP is synchronized:

• not synchronized

  sudo ntpq
  ntpq> pe
  No association ID's returned
  ntpq> quit
  

• synchronized:

       remote           refid      st t when poll reach   delay   offset  jitter
  ==============================================================================
  -server4.webster 193.190.230.65   2 u  166  128  376   42.563    1.633   0.375
  -ns2.my808.fr    37.187.104.44    3 u  130  128  377   87.097    1.227   0.453
  +host3.nuagelibr 138.96.64.10     2 u   10  128  377   42.990    0.007   0.361
  *ntp.tuxfamily.n 145.238.203.14   2 u   13  128  377   51.904   -0.961   0.764
  +juniperberry.ca 140.203.204.77   2 u    8  128  377   46.426    0.360   1.433
  

To synchronize with a given server:

sudo ntpdate -u pool.ntp.org
15 Jun 22:05:09 ntpdate[3409]: adjust time server 176.31.247.42 offset -0.001978 sec