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====== Install/Verify Java (Linux) ======

You will need Java installed if you want to:

  * Run the 'Universal Jar' Fabric Installer
  * Install a Fabric server. [[player:tutorials:install_server|Linux/CLI]] guide available
  * Run Minecraft in MultiMC or Prism Launcher
  * Run ATLauncher or Technic Launcher
  * Change the default “JAVA EXECUTABLE” to other than the bundled Java runtime in a Minecraft Launcher “Installation”

----
===== STEP 1: Verify if Java is already installed =====

Open a terminal window and execute ''java -version''.

If it returns with something like this, Java is already installed.

<code>
saiko@invader ~ % java -version
openjdk version "14.0.1-internal" 2020-04-14
OpenJDK Runtime Environment (build 14.0.1-internal+14-adhoc..jdk14u-jdk-14.0.17)
OpenJDK 64-Bit Server VM (build 14.0.1-internal+14-adhoc..jdk14u-jdk-14.0.17, mixed mode, sharing)
</code>

----
===== STEP 2: Install Java =====

Install Java using your distribution's package manager. This step will vary across distros, so in case it is not listed here, please refer to your distro's documentation.

Convention: commands starting with a ''#'' must be run with privilges like so ''sudo [command] [options]''.

===== Arch Linux =====

Install the latest JRE with this command:
<code>
# pacman -S jre-openjdk
</code>

If you're only running a server without the need for a graphical environment, the headless JRE is enough:
<code>
# pacman -S jre-openjdk-headless
</code>

If you want to also develop mods, you need to install the JDK instead.
<code>
# pacman -S jdk-openjdk
</code>

For more information, see the [[https://wiki.archlinux.org/index.php/Java|Arch Linux Wiki article]].

===== Fedora =====

Install the JRE for Java 8 with this command:
<code>
# dnf install java-1.8.0-openjdk
</code>

If you're only running a server without the need for a graphical environment, the headless JRE is enough:
<code>
# dnf install java-1.8.0-openjdk-headless
</code>

If you want to also develop mods, you need to install the JDK instead.
<code>
# dnf install java-1.8.0-openjdk-devel
</code>

For more information, see the [[https://docs.fedoraproject.org/en-US/quick-docs/installing-java/|Fedora Wiki article]].

===== Gentoo =====

Install the latest JRE with this command:
<code>
# emerge -a jre
</code>

If you're only running a server without the need for a graphical environment, the headless JRE is enough, for that you can enable //USE=headless-awt// and then emerge a JRE that supports it, such as //dev-java/openjdk// or //dev-java/openjdk-jre-bin// for the precompiled version:
<code>
# euse -E headless-awt # or manually change make.conf/package.use
# emerge -a dev-java/openjdk
</code>

If you want to also develop mods, you need to install the JDK instead.
<code>
# emerge -a jdk
</code>

For more information, see the [[https://wiki.gentoo.org/wiki/Java|Gentoo Wiki article]].

===== Void Linux =====

Install the latest JRE with this command:
<code>
# xbps-install openjdk-jre
</code>

If you want to also develop mods, you need to install the JDK instead.
<code>
# xbps-install openjdk
</code>