Is there any program that could automatically turn off a computer ?

[IroniK]

Hello !

I'm wondering if there is any program that could turn off my computer after a chosen time. For example, I choose a time on the software and my computer will be switched off when I'm not here.
Is it possible ?

Thank you !

[bigtomrodney]

You can shutdown your computer from the command line using shutdown. Using this in combination with cron you can set your PC to shutdown anytime you like.

[oz]

Doing as Big Tom suggested, you can set it to shutdown in a certain number of minutes, or at a certain time of the day.

You could also make a button for it using some such command if you wish to run the command from the GUI.

[IroniK]

Thank you for your answers !

I think I'm going to use the first way (using the command line "shutdown")

[RFahy]

Hello !

I'm wondering if there is any program that could turn off my computer after a chosen time. For example, I choose a time on the software and my computer will be switched off when I'm not here.
Is it possible ?

Thank you !

I wrote a script.

#!/bin/bash

if [ "`whoami`" != "root" ];
then
	echo "You must be root to run this.";
	exit 1;
fi

if [ $# -ne 1 ];
then
	echo "You didn't specify the time. e.g. 12:00";
	exit 2;
fi

while true
do
    CurrentDate=`date`
    CheckThis=`echo $CurrentDate | grep $1`
    
    if [ -n "$CheckThis" ];
    then
	echo "Shutting down now: `date`.";
	shutdown -h now;
    else
	echo "Waiting some more: `date`";
	sleep 1m;
    fi
done

It verifies the date from minute to minute. It's not the smartest design, someone smarter than myself would've calculated the difference between the current and target time then just have waited for it to run out. But anyway, this ought to work.

[IroniK]

Oh, thanks a lot for this.

[darkrose0510]

why all the scripting and cron and such?

$ shutdown -h +30

will shutdown the system in 30 minutes, or

$shutdown -h 16:28

will shutdown the system at 4:28PM, for more details:

$ man shutdown

[RFahy]

why all the scripting and cron and such?
[...]

$shutdown -h 16:28

That made me laugh out loud (at my own stupidity), I don't know what got into me when I wrote the script. Sorry. If nothing else, it may teach a bit of Bash syntax.

Oh well.