htpdate

Synchronize local date and time via HTTP headers from web servers. More information: http://www.vervest.org/htp/.

• Synchronize date and time:
  sudo htpdate {{host}}
• Perform simulation of synchronization, without any action:
  htpdate -q {{host}}
• Compensate the systematic clock drift:
  sudo htpdate -x {{host}}
• Set time immediate after the synchronization:
  sudo htpdate -s {{host}}