# Issue the command: <b><code><span style="color:#3366CC;font-size:1.2em;">which chocolate-doomlbreakouthd</span></code></b><br>Is there a program called '''chocolate-doomlbreakout2''' on your system?# Perform an Internet search for the pattern: <b><code><span style="color:#3366CC;font-size:1.2em;">lbreakouthd tar.gz</span></code></b># Go to the following url an appropriate webpage and download a "zipped tarball" (compressed source code) for the '''[https://www.chocolate-doom.org/wiki/index.php/Downloads chocolate-doom]lbreakoutHD''' game (filename should be something like: '''chocolate-doomlbreakout2-32.06.15.tar.gz''')# Change to the directory where you downloaded that file (most likely '''~/Downloads'Download''s).# Use the '''tar''' command to decompress the "zipped tarball" called something like (not may be exactly): '''chocolatelbreakouthd-doom-31.01.1.tar.gz'''.# Change to the directory that contains that ''chocolate-doomlbreakouthd'' source code.