On Unix the easiest way to run the program is to run the script called art in the Artemis installation directory (see the section called Getting and Installing Artemis in Chapter 1) like this:
~/artemis/art
If all goes well you will be presented with a small window with two menus. See the section called The Artemis Launch Window to find out what to do next.
Alternatively you start Artemis with the name of a sequence file or embl file eg:
~/artemis/art ~/artemis/etc/c1215.embl
See the section called UNIX Command Line Arguments for Artemis for a list of the other possible arguments.
Here is an alternative way to run Artemis if the art script doesn't work for you:
cd ~/artemis
java -Dartemis.environment=UNIX Diana