I have a script that runs from rc.local
(a minecraft server in this case) with which I need to be able to interact (connect to its STDIN and STDOUT later). How can I do this?
1 Answer
What you want to do is use screen
. It allows spawning a process inside its session and detaching from it. Essentially , your question is similar to this.
The 3 steps that you want to do:
The line below has to go into your
/etc/rc.local
. Add&
sign at the end of it ( important !)screen -S MyMinecraftServer -d -m java -jar ./SOMEFILES/CLEANUP/minecraft_server.1.8.8.jar nogui
This is what you'd do from command-line to find your session:
screen -ls
Example output:
There is a screen on: 1720.MyMinecraftServer (2017年01月12日 13时54分36秒) (Detached) 1 Socket in /var/run/screen/S-xieerqi.
And this is how you attach to it:
screen -x 1720.MyMinecraftServer
NOTE: starting minecraft server from /etc/rc.local
can be a potential security hole. Consider using su username -c '<screen command here>' &
to run the server as a different user. See also : https://serverfault.com/a/422952/363611
-
2An alternative to
screen
would be the somewhat more moderntmux
. The principle remains the same though the command-line options are all a little different. Jan 12, 2017 at 22:22 -
2P.S.: Since you're doing all of this from
rc.local
: you shouldn't run a Minecraft server with super-user privileges – especially if it's ports are publicly accessible. Jan 12, 2017 at 22:25
screen
?