This will show you what extracts, and in most cases will be in a sub directory of FILENAME.
FILENAME.tar.bz2 is the name of the tar file we wish to create. dir1 and dir2 are the names of the directories and/or files we wish to include in the tar.bz2 archive.
To use gzip compression instead of bz2, simply put zcvf in place of jcvf in the command line
you may need to install unrar first using