htpdate
Synchronize local date and time via HTTP headers from web servers.
TLDR
Synchronize date and time
$ sudo htpdate [host]
Perform simulation of synchronization, without any action
$ htpdate -q [host]
Compensate the systematisch clock drift
$ sudo htpdate -x [host]
Set time immediate after the synchronization
$ sudo htpdate -s [host]
