Update MineOS to a newer version of Java

[Sumisu]

If your Minecraft servers are not starting, it could be do to MineOS not having a new enough version of Java. To update the Java version you just need to run a few commands. This will update MineOS to Java 22.

First we need to remove the default Java version with this command:
apt remove java-common (if nothing gets removed, that’s okay, just continue to the next step)

Next we need to download Java 22 for Linux x64:
wget https://download.java.net/java/GA/jdk22.0.2/c9ecb94cd31b495da20a27d4581645e8/9/GPL/openjdk-22.0.2_linux-x64_bin.tar.gz

Now we need to extract the contents into a folder:
tar -xf openjdk-22.0.2_linux-x64_bin.tar.gz -C /opt/

Lastly we need to create a link to the new Java version we installed:
ln -sf /opt/jdk-22.0.2/bin/java /usr/bin/java

Now that Java is updated you should now be able to start your Minecraft server without restarting. Even thought the server will boot, I would recommend restarting MineOS just to be safe.