Suspend

This post is to sum up the changes I needed to make to the suspend function.

Using systemd for suspend

At the end of the day, I put my computer in sleep mode with this command: sudo systemctl suspend.

But anyone can resume it from sleep and access the computer. So I needed to launch slock before to lock the screen.

Using systemd hooks

Fortunately, systemd allows you to have hooks. In /etc/systemd/system/, add a file suspend@user.service.

Here is the file:

[Unit]
Description=User suspend actions
Before=sleep.target

[Service]
User=user
Type=simple
Environment=DISPLAY=:0
ExecStart=/usr/bin/slock

[Install]
WantedBy=sleep.target

Now, when the computer is waking up, slock is launched \o/