hwclock from util-linux 2.27.1

Usage: hwclock [function] [option...] Query or set the hardware clock. Functions: -h, --help show this help text and exit -r, --show read hardware clock and print result --get read hardware clock and print drift corrected result --set set the RTC to the time given with --date -s, --hctosys set the system time from the hardware clock -w, --systohc set the hardware clock from the current system time --systz set the system time based on the current timezone --adjust adjust the RTC to account for systematic drift since the clock was last set or adjusted -c, --compare periodically compare the system clock with the CMOS clock --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 --predict predict RTC reading at time given with --date -V, --version display version information and exit Options: -u, --utc the hardware clock is kept in UTC --localtime the hardware clock is kept in local time -f, --rtc <file> special /dev/... file to use instead of default --directisa access the ISA bus directly instead of /dev/rtc --badyear ignore RTC's year because the BIOS is broken --date <time> 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 --update-drift update drift factor in /etc/adjtime (requires --set or --systohc) --noadjfile do not access /etc/adjtime; this requires the use of either --utc or --localtime --adjfile <file> specifies the path to the adjust file; the default is /etc/adjtime --test do not update anything, just show what would happen -D, --debug debugging mode