Update installing-minecraft-java-server.md

tutorials/installing-minecraft-java-server.md

@@ -43,10 +43,83 @@ Start the server with the command `java -Xmx 1024M -Xms 512M -jar server.jar` ,
 
 On the first run, the server will probably ask you to change `server.properties`, that's because you need to accept the Minecraft server End User License Agreement (EULA). We'll use the trip to also configure the server in the same file, you can generate one preconfigured with [this generator](https://mctools.org/server-properties-creator). If you want to proceed without configuring the server, just set `eula=true`.
 
+## Managing the server after first run
+Just running the server probably isn't enough for you. You probably need to keep the server running after a SSH session ends, or get back to console after detaching the server from your session.
+
+### Keeping the server running when session ends
+To keep your server running, for example, when a SSH session ends, you can use the command `nohup`, which wraps around your server and ignores the hangup signal, the one that stops your server when the session ends. Simply prefix your server start command with `nohup`, for example: `nohup java -jar purpur.jar`. Remember that `nohup` **will not** ignore other signals, pressing CTRL+C **will** kill your server.
+
+The server output will be written to a file named `nohup.out`, you can see it live with the command `tail -f nohup.out`.
+
+### Regaining access to console
+After loosing access to the console from the session that started the server, one may want to regain access to said console.
+
+If you're running PaperMC, you can use a plugin called [NPanel](https://hangar.papermc.io/nerotvlive/npanel), which provides a web interface with console included.
+
+However NPanel is getting outdated and appears to not be actively maintained anymore, thus one may want to use Minecraft's built-in remote access tool, the *rcon*.
+
+To use rcon, first you need to enable it in `server.properties` and set a password (needed):
+```properties
+enable-rcon=true
+rcon.port=25575
+rcon.password=your_rcon_pasword
+```
+
+After setting up rcon on the server, you'll need yo compile *mcrcon*, the client for rcon. You can do so by running the following commands:
+
+```bash
+git clone https://github.com/Tiiffi/mcrcon
+cd mcrcon
+make
+mv mcrcon $PREFIX/bin
+```
+
+After this you can reload your shell (usually by running `bash` or `zrc`) and the command `mcrcon` will be available. Then you can connect to the server with the following command:
+
+```
+mcrcon -p your_rcon_pasword
+```
+
+You may also run commands directly by appending them to the end of the command, below is an example that stops your server:
+
+```
+mcrcon -p your_rcon_pasword stop
+```
+
+### Automatic restart and stopping
+One may want to restart the server when it shuts down, preventing further downtime and manual intervention, but a way to stop the server from this restart loop would be nice too, below are two scripts that work together to start, automatically restart, and stop on-demand:
+
+```bash
+#!/data/data/com.termux/files/usr/bin/sh
+
+cd your_server_location/ # Remember to replace this with your server location
+
+while true; do
+    if [[ -f ~/.srv-stop ]]; then
+        echo "Stopping server."
+        rm ~/.srv-stop
+        exit 0
+    else
+        echo "Starting server."
+        # Remember to replace purpur.jar with your server JAR
+        nohup java -Xmx1500M -jar purpur.jar -nogui
+        echo "Server stopped. Restarting in 5 seconds..."
+        sleep 5
+    fi
+done
+```
+
+```bash
+#!/data/data/com.termux/files/usr/bin/sh
+
+touch ~/.remix-stop # Creating the magic file
+mcrcon -P 25575 -p 'your_rcon_password' stop
+```
+
 ## Installing mods and plugins
 It's really simple, if you're using a plugin loader, put plugins JAR files inside the folder named `plugins`, for modloaders put the JARs inside `mods`. Each loader/plugin/mod may have it's own config file, please refer to their documentation.
 
-##  Joining the server
+## Joining the server
 You can get your current IP address using the command `ip addr` or `ifconfig`, both may need superuser rights. You can also see your IP in the network properties in Android's settings app. Once you got your IP (usually looks like `192.168.18.1`) you can enter it in a Minecraft Java client connected on the same network (usually wi-fi) as the server.
 
 *Have fun!*