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TethysL CLI Installation

Java based executables as well a binary executables for various platforms are made available at: These are described below.

Java-based Release


The Java based release is the recommended installation option as most TethysL development and testing is primarily done on this environment. On the other hand, although generated automatically from the Java-based release,1 the binary releases are not as fully tested and may be unexpected issues with them.

Artifact Contains tethysl launcher script and supporting files

A "Java release" means an executable format that is to be run via the java program, which is part of a typical Java runtime environment installation. The tethysl executable itself is a shell script that launches TethysL via the java command, which is assumed to be on your PATH. If not already on your system, you can install Java using common package managers or directly from

  • Unzip in some location of your choice. This will create a directory tethysl-X.Y.Z/ under that location.

  • Open a terminal session and cd to the extracted tethysl-X.Y.Z directory.

  • Run make install as follows depending on where you want the tethysl bash executable script to be installed.


    • To install tethysl under the default location ~/local/bin/:

      make install
    • To install tethysl under /opt/tethysl/bin/:

      sudo make install PREFIX="/opt/tethysl"

    NOTE: The PREFIX value to be indicated should be the parent directory of bin/.

Binary Release


The native binaries are automatically generated from the Java-based release, but are not yet as stable and fully functional in general, or all of them available for the latest TethysL release.

Artifact Contains tethysl Linux binary tethysl macOS binary tethysl.exe Windows binary

A binary release means a standalone, native tethysl executable. Depending on target platform, each binary release is packaged as a ZIP archive, only containing the corresponding executable program, which is named tethysl for both Linux and macOS, and tethysl.exe for Windows.

macOS note

The executable binary for macOS is not signed, so it will not run right away when downloaded from the internet. Try running xattr -d tethysl to allow its execution.

  • Typically, you will want the CLI executable to be findable through the PATH environment variable. Extract the executable from the zip in a location that is part of the PATH.

  • To verify the installation, run tethysl --help, which should display the usage message on your terminal.

  1. TethysL is written in Scala, one of the languages that target the Java Virtual Machine (JVM). Binary releases from the JVM version are created using GraalVM technology