hwclock
hwclock [option]
System administration command. Read or set the hardware clock. This command maintains change information in /etc/adjtime, which can be used to adjust the clock based on how much it drifts over time. hwclock replaces the clock command. The single-letter options are included for compatibility with the older command.
Options
You may specify only one of the following options:
-a, --adjust
Adjust the hardware clock based on information in /etc/adjtime and set the system clock to the new time.
--getepoch
Print the kernel\'s hardware clock epoch value, then exit.
-r, --show
Print the current time stored in the hardware clock.
-s, --hctosys
Set the system time in accordance with the hardware clock.
--setepoch, --epoch=year
Set the hardware clock\'s epoch to year.
--set --date=date
Set the hardware clock to the specified date, a string appropriate for use with the date command.
-v, --version
Print version and exit.
-w, --systohc
Set the hardware clock in accordance with the system time.
The following may be used with the above options.
--debug
Print information about what hwclock is doing.
--localtime
The hardware clock is stored in local time.
--noadjfile
Disable /etc/adjtime facilities.
--test
Do not actually change anything. This is good for checking syntax.
-u, --utc
The hardware clock is stored in Universal Coordinated Time. |
