I use Torrents often, so I need to know how to make my computer start up and shut down automatically, Wi-Fi is switched on at six in the morning in my hotel and switched off at two AM. (I am able to schedule torrents, that's not a problem), I don't want my computer always plugged in to a power supply.
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MythTV is able to shut down computer when it's no longer in use and wake it up a few minutes before the next recording starts. It does it by using ACPI functions to set wakeup time before shutting down. There is an extensive howto on configuring this, which basically boils down to:
First verify that your Linux kernel is 2.6.22 or newer and the HWclock update function has been disabled as described above.
Simple test to wake the machine 5 minutes from now
sudo sh -c "echo 0 > /sys/class/rtc/rtc0/wakealarm" sudo sh -c "echo `date '+%s' -d '+ 5 minutes'` > /sys/class/rtc/rtc0/wakealarm" cat /sys/class/rtc/rtc0/wakealarm
This should return a list of parameters. Check the "alrm_time" is 5 minutes into the future and the "alrm_date" is today.
Shutdown your computer and see if it comes back up in ~5 min.
sudo shutdown -h now
(in Ubuntu 10.4 "sudo shutdown -P now" (-h may cause system to restart))
Of course, if you always need to shut the computer down at the same time and wake it up at the same time, you can just configure wake-up time in bios (if there's such an option) and schedule a shutdown right from init scripts
Mens Nike Air Max Premium 875844-003 Pure Platinum Black Brand New Size 10,Great, didn't know about it. Should alrm_pending be 'yes' if alarm is set? – int_ua Nov 29 '11 at 11:37
Nike Hypervenom II DF FG Black/White Electric Green Blue SIZE 11.5 (844428-018),On my machine alarm_pending is "no" even after I set the wake-up time using the script above. The machine wakes up perfectly though so I think this parameter means something else – Sergey Nov 29 '11 at 21:26
I've written an application to schedule startup, it's called Wake on Plan.
It's not available in the official repository yet (review pending) but you can start using it from PPA:
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I've created the QML version with Ubuntu SDK using phone as a target and hoping for easy porting to desktop over a year ago. But click packages were never ready for use on desktop and now I'm waiting until snappy packages will be. Please notify me when they are. Right now even
snappy list -uv crashed on my 15.04x64 installation and it doesn't look ready at all. Or you can try building a deb packages yourself, I'll try to help as much as I can.
1I've tried it (January 18th, 2013) and it works well under 12.10 — though there is no "Quantal" package. Is it under active development? – Ed Villegas Jan 19 '13 at 14:42
And Quickly 12.08.x intended for usage under 12.10 breaks a lot, so I first wanted to finish the 12.04 version. – int_ua Jan 20 '13 at 6:08
Good luck and thanks for sharing your work! – Ed Villegas Jan 20 '13 at 6:49
1Does this still work? If so, could you build packages for more recent Ubuntu versions please? :) – Seth♦ Jul 12 '15 at 18:10
Use cronjob to auto shootdown and auto power on. The command below will shutdown the computer at 02.00 AM and start the machine 4 hours later (14400 seconds)
00 2 * * * root /usr/sbin/rtcwake -m off -s 14400
I'm using an older Ubuntu 10.04.4 LTS system, and I have had some success with the rtcwake command. Use it like this on the command line:
# wake the system in 1 Hour: sudo rtcwake -s 3600 -m disk
-m disk option should put it in a low-power state, and depending on hardware support (i.e.: your own computer), you might even be able to successfully use
-m off to fully power off.
Also, you can put the above into the /etc/crontab to schedule it automatically every day.
You can use
shutdown command to schedule a shutdown. To shutdown at 2 AM you can use the following command:
sudo shutdown -h 2:00
You will need to run this command in terminal and leave the terminal open.
Regarding startup, I dont think that it is possible for Ubuntu or any app running on it to switch on a computer. You will need hardware assistance for this for example you can use Wake on Lan.
Regarding startup - you're correct in a very narrow technical sense (because Ubuntu is not running when a computer is down), but with a bit of trickery it is possible to schedule a wakeup from a program/script. :) – Sergey Nov 29 '11 at 11:02
I don't think you need to keep the terminal open. You can stop the job with
ctrl-zand then use
bgto background it. Log out, log in and
ps ax | grep shutdownshould show that it's still running. – Jared Beck Feb 13 '13 at 1:18
I suggest this command in your cron:
dbus-send --system --print-reply --dest=org.freedesktop.UPower /org/freedesktop/UPower org.freedesktop.UPower.Suspend
This does not need root.