$ unzip .zip
.rar
if it doesn't work it means rar is not installed yet
install rar with following command bellow.
$ sudo apt-get install unrar
then how to run rar command
$ unrar .rar
.tar.gz
$ tar zxvf file_name.tar.gz
to create tar.gz the command is
$ tar cf .tar.gz file file file …
.tar.bz2
$ tar jxvf .tar.bz2
to create .tar.bz2 the command is
$ tar jcvf .tar.bz2 file file file …
