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Hello.

I have a little problem.

I have compiled and installed the minetest game / server on VPS.
I connect to VPS by SSH console and run server by typing ./minetestserver and the server starts,but problem is, when i close the SSH connection, the minetestserver stops :/

Can you help me please ?

Use screen

There is nothing to screen :/

Simply when i close the SSH session, the server is down too, and the log file ends with standard message which is logged before it falls

I mean this

Thanks a lot. It helped me ;)

Or start it with ./minetestserver &

BrandonReese wrote:Or start it with ./minetestserver &

It is way harder to kill one specific minetestserver instance when you do it like this.

Use tmux, it is so much better than screen! /flamewar_ends

tmux has some great features (screen might has - i never really used it)

Start tmux:



"action key" in tmux:

ctrl+b

to list all "windows"

ctrl+b+l

get help: ctrl+b+?

go to "window" $number

ctrl+b+$number


i think you get the idea.

To logout of tmux like every where else:

ctrl+b+d

because ctrl+d will exit a shell

then tmux runs in the background, when you log in again just type (for append) and you will find your tmux session like it was before.

Also cool stuff: ctrl+b+" and ctrl+b+% you change between the sides with ctrl+b+arrow

I see nobody explained what happened. I try.

On UNIX/Linux processes are spawned in a tree.

At the root there is a process called "init" which is spawns every other process. init has the first PID (process ID) so 1 (or 0 on some systems).

So somewhere in the tree there is a process called sshd, which is the deamon (therefore the d in sshd) which provides the ssh server. When a user logs in via ssh sshd will spawn a process (ssh login shell) for the user. Now when the user starts a program like it will be spawned by the ssh login shell.

So minetest is a child of your ssh shell. When you exit the shell it will be exited (closed/terminated), therefore all childs (like the minecraft server) die.

Let's look at the simplified tree:

init
└─ sshd
└─ ssh session
└── login shell
└── minetest


So when you leave the session all three processes will die.

That's it.

There are several ways to "disconnect" a child process from its parent (it will get another parent - remember there is always init). Like



When you use screen/tmux your process (minetest server) will be a child of screen/tmux, which is not a child of sshd or it's sessions for obvious reasons.

If you want to look at the tree, just use



Hope this explanation helps.

lightonflux

Thanks for all replies, I am a bit smarter now.

Now i understand this problem and know how it works ;)