Thread: Automatically suspending and resuming

hi all. got new computer, turned old laptop server. in high school, , mum worried power bill, wondering if able turn laptop off automatically @ 8:30 am, , start again on 3pm (mon-friday - weekends stay on overnight).

the first hurdle working out how put system sleep. package "pm-utils" contains command-line tools suspend , hibernate, because install package (and dependencies) doesn't mean it'll work. still, give try; might work out of box.

next hurdle, you'll need work out how wake system @ specified time. may need adjust bios settings allow wake rtc (real time clock).

don't know if there pre-built scripts setting alarm. of have seen involves commands accessing /proc , /sys hooks. digging through notes, found sequence, presumably sets alarm 1 minute in future:

code:

sudo sh -c "echo 0 > /sys/class/rtc/rtc0/wakealarm"  sudo sh -c "echo `date '+%s' -d '+ 1 minute'` > /sys/class/rtc/rtc0/wakealarm"

once know how safely suspend system , wake @ specified time, can automate. may wish more careful saying, "suspend @ 8:30 every weekday." if you're home sick? i'm not @ writing shell scripts on fly, can write script cover contingencies come mind. put script crontab of root , set run @ appropriate time.

also, check out package "powernap", can configure automatically suspend system after interval of inactivity. (not quite asked for, maybe it'll give ideas.)

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