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Java for Linux and Unix

A Java Runtime Environment (JRE) must be installed before installing jLog. The newest revision of Java 1.8 (e.g. 1.8.0_271) or newer is strongly recommended. Note that the Java Runtime provided with old Linux distributions cannot be used!

Frequent upgrades to the newest revision is recommended as this usually provides both visual and performance improvements as well as bug-fixes.

Please note that you must install Java as a user with 'root' privileges (e.g. using sudo to run the installation script).


The simplest way of installing for users of e.g. Ubuntu or Linux Mint may be to install the additional openjdk-8-jre packages. Linux Mint may have built-in Java support.
Use sudo apt install openjdk-8-jre.

Note: Avoid using openjdk-11 with Ubuntu because font scaling fails with Java Swing applications like jLog.   Linux Mint 19 using openjdk-11-jre seems to work well after recent updates.

You may want to uninstall JDK11 and replace it with JDK8 which has a good implementation of Java Swing:
   sudo apt remove openjdk-11-jre-headless openjdk-11-jre openjdk-11-jdk-headless openjdk-11-jdk
   sudo apt-get install openjdk-8-jdk

Select the JRE variant (unless you are a professional needing the extra functionality of the JDK for other purposes).

Oracle's Java 1.8.0_231 ("Java 8") can be downloaded here (13-19 Mb).


  • Please look for platform specific information on how to replace the built-in Java with the full-blown Java from Oracle (needed by jLog).
  • Try running jLog as root if you experience problems, i.e. to find out if the problem is caused by improper access or improper installation of the files.