RTCWAKE(8) rtcwake - rtcwake [] [-d ] [-m _] {-s |-t _t} . . RTC . apmsleep, ACPI S1 () S3 (--). BIOS-, APM- ACPI-. , nvram-wakeup, ACPI S4 ( ). . Note that alarm functionality depends on hardware; not every RTC is able to set up an alarm up to 24 hours in the future. ; . rtcwake . -A, --adjfile . -a, --auto ( ) adjtime, hwclock(8) . . --date - Set the wakeup time to the value of this timestamp. The format of timestamp can be any of the following: YYYYMMDDhhmmss "YYYY-MM-DD hh:mm:ss" "YYYY-MM-DD hh:mm" (seconds is 00) YYYY-MM-DD (time is 00:00:00) hh:mm:ss (date is today) hh:mm (date is today, seconds is 00) +number[smhd] (seconds/minutes/hours/days after now) tomorrow (time is 00:00:00) Examples of the +number[smhd] format are: +5m, +6h, +2d. The unit specifier may be longer: +5min, +6hours, +2days. -d, --device rtc0 . RTC-. rtc1, rtc2, ... . -l, --local , adjtime . --list-modes --mode. -m, --mode . : standby ACPI S1. , , , . . freeze , . , --, . ( 3.9.) mem ACPI S3 (--RAM). , , - . disk ACPI S4 (--). , . ,,--RAM", . off ACPI S5 (). ,,/sbin/shutdown". ACPI-, . no , RTC . on , RTC . . disable . show Print alarm information in format: "alarm: off|on