MineOS

Steps to Update Java in MineOS/Linux Server

Time to update when the Java runtime no longer runs the jar file of the new Minecraft version. Typically (as in almost always) happens after a Minecraft update.

Aaron Little

• 2 min read
Steps to Update Java in MineOS/Linux Server
Dall-e generated: Minecraft Server

Time to Update

Time to update when the Java runtime no longer runs the jar file of the new Minecraft version. Typically (as in almost always) happens after a Minecraft update.

This article also applies to Linux in general (so take a look at what applies).

Steps to Update

  1. Find the minimum version of Java that you need. Google has worked best for me as I've not really found a reliable source for new releases. But if your server crashes in MineOS shortly after starting (after updating the version), this is probably your culprit.
  2. If your MineOS server is based off of the iso, your Java files live in /opt/ but MineOS uses a symlink to find these executables: "/usr/bin/java". You can see where this symlink resolves by typing
readlink -f /usr/bin/java

Take note of this location. You don't need to necessarily remove the Java files at this location. We will recreate the link to the new location. Leaving these files at least for now will allow us to roll back if we need to.

  1. Find where you want to download your java version from. We are looking for the actual path to the tar file (so you need a path that starts [preferably] with "https" and ends with ".tar.gz"). There are many flavors of java out there as well but this is to download from Java.net (assuming you are getting 22.0.2 version):
wget https://download.java.net/java/GA/jdk22.0.2/c9ecb94cd31b495da20a27d4581645e8/9/GPL/openjdk-22.0.2_linux-x64_bin.tar.gz
  1. Unpackage the file and move the file to the /opt/ directory.
tar -xvzf openjdk-22.0.2_linux-x64_bin.tar.gz
#dir will show name of unpackaged file.
mv jdk-22.0.2 /opt/
  1. Remove the old symlink and recreate it to the new location.
rm /usr/bin/java
ln -s /opt/jdk-22.0.2/bin/java /usr/bin/java
  1. Test by running "java -version" at this point. If you do it should list the new version you updated to. At this point why not reboot.

That's it. At this point your new MineOS java server hopefully starts and stays up! An upcoming article will walk through the steps of updating that in MineOS.

AI Disclaimer

I used Dall-e AI to generate a header image for this article.