How to run a command at startup with screen?

[Nailox]

Hi. I need to run a shell script in a screen session on every reboot. How can I do this ? I tried with "@reboot /path/to/script" in crontab but its not working. I found this http://serverfault.com/questions/233...screen-session but I can't understand it. Can you help me with this ? TYA

[Lars Noodén]

You might try launching your script from /etc/rc.local. It is run after all the other SystemV init scripts.

screen is very powerful and a bit complex. If the complexity is where you are having trouble, then you might look also at tmux. It is a lot simpler and lacks many (most) of the features of screen but it can attach/detach nicely on demand.

[Nailox]

You might try launching your script from /etc/rc.local. It is run after all the other SystemV init scripts.

screen is very powerful and a bit complex. If the complexity is where you are having trouble, then you might look also at tmux. It is a lot simpler and lacks many (most) of the features of screen but it can attach/detach nicely on demand.

How would launch it from /etc/rc.local ? Just copy it there?
Also if I use tmux - how to run the script with tmux on reboot?

[Lars Noodén]

Yes, just copy it there, putting it ahead of the line 'exit 0'

If you use tmux it can go something like this:

/usr/bin/tmux new-session -d '/usr/local/bin/myscript'

That will start a new session, launch your script, then detach.

[Nailox]

Yes, just copy it there, putting it ahead of the line 'exit 0'

If you use tmux it can go something like this:

/usr/bin/tmux new-session -d '/usr/local/bin/myscript'

That will start a new session, launch your script, then detach.

So i copied this line (with my details) in rc.local. I rebooted and now in the running processes i see "sleep 720" which is part of the shell script. But I dont see the name of the script there. tmux is running. The same thing happened when I used "@reboot script.sh" in cron. So how can i tell if its running correctly ?

[Lars Noodén]

You can see if tmux is running properly by listing sessions or trying to attach.

# list sessions
tmux list-sessions

# or attach
tmux a

Does your script work if you run it manually?

[Nailox]

You can see if tmux is running properly by listing sessions or trying to attach.

# list sessions
tmux list-sessions

# or attach
tmux a

Does your script work if you run it manually?

ok I rebooted and listed sessions - i see one window
I attached to it and I can see the script running. So that means its all good right ?

[Lars Noodén]

Yes, congratulations!

[Nailox]

Thanks a lot for the help !