Does linux kill background processes if we close the terminal from which it has started?

Question

I have an embedded system, on which I do telnet and then I run an application in background:

./app_name &

Now if I close my te

Answer 1

When you close the terminal, shell sends SIGHUP to all background processes – and that kills them. This can be suppressed in several ways, most notably:

nohup

When you run program with nohup it catches SIGHUP and redirect program output.

$ nohup app &

disown

disown tells shell not to send SIGHUP

$ app &
$ disown

Is it dependent on version of linux?

It is dependent on your shell. Above applies at least for bash.