dirname $(dirname $(readlink -f $(which java)))
A: Absolutely. Most cloud providers and enterprises use OpenJDK-based JREs. jre linux
openjdk version "11.0.22" 2024-01-16 OpenJDK Runtime Environment (build 11.0.22+7-post-Ubuntu-0ubuntu222.04.1) OpenJDK 64-Bit Server VM (build 11.0.22+7-post-Ubuntu-0ubuntu222.04.1, mixed mode, sharing) To see the exact JRE path: For running Java apps in production – especially
java -version Example output (OpenJDK 11): Point it to the JRE installation directory
For development or building code, install the instead. For running Java apps in production – especially headless servers – the JRE is exactly what you need.
source ~/.bashrc curl -s "https://get.sdkman.io" | bash sdk install java 17.0.9-tem sdk use java 17.0.9-tem 8. Setting JAVA_HOME Correctly Even if you only need the JRE, many applications check JAVA_HOME . Point it to the JRE installation directory.
which java # or readlink -f $(which java) Linux allows multiple JREs side-by-side. Use update-alternatives (Debian/Ubuntu) or manually set JAVA_HOME . Using update-alternatives (Debian/Ubuntu) # List available Java runtimes sudo update-alternatives --config java Manually register a new JRE sudo update-alternatives --install /usr/bin/java java /opt/jre-17/bin/java 1700 Manual JRE Switching (any distro) Set environment variables per user in ~/.bashrc or ~/.profile :