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Java for Linux and Unix

A Java Runtime Environment (JRE) must be installed before installing jLog. The newest update of Java 1.8 or newer is strongly recommended. Note that the Java Runtime provided with many 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 (or e.g. openjdk-9-jre) packages. Linux Mint may have built-in Java support. Use sudo apt install openjdk-<8>-jre where <9> denotes the Java version.

Note: Avoid using openjdk-11 because font scaling fails with Java Swing applications like jLog.

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_191 ("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.