How to use the rtcwake command

Question

I would like to get my rtcwake command to wake my computer from sleep at 06:00 the following day.

Here is the command I'm using:

rtcwake -m mem -u -t $(date +\%s -d "tomorrow 06:00")

So far it isn't waking. Any ideas?

posted this for me. I have it in a cronjob and the going to sleep part works but it never wakes up. I have to manually wake it and when i do that the computer says the time is still the time that it went to sleep. — basketball, Oct 04 '14 at 14:05
@basketball I am not sure I get this right, ryanlee posted this for you? — Jacob Vlijm, Oct 05 '14 at 07:44
@basketball does the sudo work for you? If not, I'll remove the answer, if it does, would you ask ryanlee to accept the answer? otherwise it will continue to appear as unanswered. — Jacob Vlijm, Oct 05 '14 at 15:07
@basketball you could try the -m disk option if your system doesn't support the -m mem option (which is not uncommon). The command needs sudo anyway. Sorry, I missed the #ubuntu. — Jacob Vlijm, Oct 05 '14 at 17:33

score 2 · Answer 1 · edited Apr 13 '17 at 12:23

2

Following link already has your answer: Automatically sleep and wake-up at specific times

Also, you can check more about rtcwake using following:

Press, Ctrl+Alt+T.
Type in, $ man rtcwake

edited Apr 13 '17 at 12:23

Community

1

answered Oct 04 '14 at 04:47

devGeek

594

that didnt work – basketball Oct 12 '14 at 05:18

score 1 · Answer 2 · answered Nov 02 '14 at 18:23

1

I dont know why but in order for rtcwake to work inside of cronjob, you must run sudo crontab -e and then pastesudo rtcwake -m mem -u -t $(date +\%s -d "tomorrow 06:00").

answered Nov 02 '14 at 18:23

basketball

119

How to use the rtcwake command

2 Answers2