2. Download and unzip the file called jacksum-1.7.0.zip.
3. Start Jacksum in a terminal by typing
java -jar jacksum.jar
4. In order to start Jacksum with more comfort from any directory
jacksumyou have to modify the launch script that is part of the distribution and place it in a folder that is reachable within your PATH environment variable. Also make sure that the user has execute permissions on the file (man chmod). Alternatively you can set also an alias (e. g. alias jacksum="java -jar "<path to jacksum.jar>"/jacksum.jar)
The long list of contributors can always be found in the latest download package and in the copyright section. The founder and lead for this project is Johann N. Löfflmann from Germany. Since 2002 he has been working with very talented people all around the world in order to improve Jacksum further.