sntp - Syncs the system time and RTC against a SNTP or NTP server

Usage: sntp SERVER/A,NOSAVE/S,QUIET/S

SERVER: A NTP or SNTP server. They use the same protocol and return the same

    data, but the two types of clients work and use the data differently.

NOSAVE: Don't save the corrected time to either the system time nor the RTC.

QUIET: Supress info output, but not errors.

Example:

1> sntp se.pool.ntp.org

Using env TZONE="CET-1" for UTC offset: -3600s west

se.pool.ntp.org is a stratum 2 server.

System clock is behind server by 192.860143s.

Correction applied to system time and RTC.