set the system time from the hardware clock
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root@s1 [~]# /sbin/hwclock –hctosys
root@s1 [~]#
set the hardware clock to the current system time
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root@s1 [~]# /sbin/hwclock –systohc
root@s1 [~]#
root@s1 [~]# /sbin/hwclock –help
hwclock – query and set the hardware clock (RTC)
Usage: hwclock [function] [options…]
Functions:
–help show this help
–show read hardware clock and print result
–set set the rtc to the time given with –date
–hctosys set the system time from the hardware clock
–systohc set the hardware clock to the current system time
–adjust adjust the rtc to account for systematic drift since
the clock was last set or adjusted
–getepoch print out the kernel’s hardware clock epoch value
–setepoch set the kernel’s hardware clock epoch value to the
value given with –epoch
–version print out the version of hwclock to stdout
Options:
–utc the hardware clock is kept in coordinated universal time
–localtime the hardware clock is kept in local time
–directisa access the ISA bus directly instead of /dev/rtc
–badyear ignore rtc’s year because the bios is broken
–date specifies the time to which to set the hardware clock
–epoch=year specifies the year which is the beginning of the
hardware clock’s epoch value
–noadjfile do not access /etc/adjtime. Requires the use of
either –utc or –localtime