Why does the application stop working when I end my remote access session?

Question

linux

Hello.
I keep the Minecraft game server on a remote virtual machine with the Ubuntu operating system, which I access via the PuTTY SSH client. In Linux and system management through the console, I understand little.
The problem is that the server crashes when you close the PuTTY program and terminate the remote access session. Can I shut down PuTTY without shutting down the server, and if so, how?
Thanks in advance for possible answers.

Answer 1

start the server with nohup/screen/tmux/etc.
putty. Does the process stop when it closes?

Answer 2

if systemd is there , then it is done like this: it is
written on the server
, in fact, this command holds the user's state.
to disable:
# loginctl disable-linger <username>

Answer 3

ctrl-z
bg
disown
well, or if the skill is enough - apt-get install screen; screen
Start the server in screen, deattach with ctrl+a, d
Then you can close putty, and you can return to the console with the running server with the screen -Rx command from the same user.