Installing on Linux:

• Open a terminal and run sudo apt update
• Install the Docker container: sudo apt install docker.io
• Create a folder where the FITS files will be placed: mkdir /home/<username>/fits
• Copy the FITS files you want to reduce to this folder.
• On your local machine run the following in a terminal: xhost +
• Run the Docker container (in sudo) with the command: docker run --name pysalt9 -v /home/<username>/fits:/home/pysalt --env DISPLAY=unix$DISPLAY --privileged --volume $XAUTH:/root/.Xauthority --volume /tmp/.X11-unix:/tmp/.X11-unix --rm -it registry.saao.ac.za/pysalt bash
• This command is now in a bash script pysalt_run.sh
• Once in the Docker container change directory /pysalt: cd /pysalt
• Launch PyRAF and then the PySALT package.

Installing on Mac OS:

• Install XQuartz
• Allow the following connections via tcp and in the XQuartz

• Run the following in a terminal: xhost +
• Download and install the Mac version of the PySALT container
• Run the PySALT bash script in the terminal
• Once in the Docker container change to directory /pysalt: cd /pysalt
• Launch PyRAF and then the PySALT package