Arch Linux run script a minute after boot

Question

I have set up a bridge between eth0 and wlan0 with netctl. It works fine if I tell it to configure eth0 and wlan0 at startup and then for me to manually start the bridge after it boots. If I tell the bridge to start automatically as well though for some reason the wlan adapter does not connect to an access point. I therefore need "netctl start bridge" to run a minute or so after the entire system has finished booting. Any idea how I should do this?

PS. This is a headless system as in no xorg so running it at xorg startup won't work.

Answer 1

You can use systemd timers to execute script a minute after boot.

First, create service file (/etc/systemd/system/myscript.service):

[Unit]
Description=MyScript

[Service]
Type=simple
ExecStart=/usr/local/bin/myscript

Then create timer (/etc/systemd/system/myscript.timer):

[Unit]
Description=Runs myscript one minute after boot

[Timer]
# Time to wait after booting before activation
OnBootSec=1min
Unit=myscript.service

[Install]
WantedBy=multi-user.target

Now enable and run it:

# systemctl enable myscript.timer
# systemctl start myscript.timer

Answer 2

Arch uses systemd to manage startup processes (daemons and the like as well).

You can write a script that simply executes the command that you want, or sleep for a min and then execute. Then add it to the boot process with the instructions on the

wiki

if you add a sleep:

#!/bin/sh
sleep 60 # one min
netctl start bridge

It should work perfectly fine. Systemd should spawn another process when it executes your script so it shouldn't make your system hang.

Answer 3

If you want something simple that's non-blocking, add the following to /etc/rc.local:

( sleep 60 && /path/to/command_or_script [opts] ) &