Automatic shutdown after 2 hours on every boot

I am using both Ubuntu and Lubuntu 16.04 and this question is regarding both of them.

I want my computer to always shut down 2 hours after it was turned on, i tried to use these instructions that I found to run a timed shutdown on startup but it does not work.

How can I do that?

1 Answer

1.Edit sudoers (you must be root):

gedit /etc/sudoers

At the end add following:

yourusername ALL=(ALL) NOPASSWD: /sbin/shutdown

and save.

2.Crete .sh script:

gedit myscript.sh

add following there:

#!/bin/sh
sudo shutdown -P +120 # shut down after 120 minutes

3.run "startup applications" tool you just need write it in search box. And press Add button:

Write there your .sh script name and path to it. Press add there too.