rtc — Provide All Real-Time Clock and GMT-Tag Management

Synopsis

/usr/sbin/rtc [-c][-z zone-name]

Description

Use the rtc command to reconcile the difference in the way time is established between UNIX and MS-DOS systems. UNIX systems use Greenwich Mean Time (GMT), whereas MS-DOS systems use local time. When used with no arguments, rtc displays the currently configured time-zone string that was recorded when rtc -z zone-name was last run.

The rtc command is not normally run from a shell prompt; it is generally invoked by the system. Commands such as date(1) and rdate(1M) that are used to set the time on a system invoke /usr/sbin/rtc -c to ensure that daylight saving time (DST) is corrected for properly.

Options

-c Check for DST and make corrections ...

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