tar -zxvf filename.tar.gz

(=tape archiver) Untar a tarred and compressed tarball (*.tar.gz or *.tgz) that you downloaded from the Internet.

tar -xvf filename.tar

Untar a tarred but uncompressed tarball (*.tar).

gunzip filename.gz

Decompress a zipped file (*.gz” or *.z). Use gzip (also zip or compress) if you wanted to compress files to this file format.

printtool

(as root in X-terminal) Configuration tool for your printer(s). Settings go to the file /etc/printcap.

setup

(as root) Configure mouse, soundcard, keyboard, X-windows, system services. There are many distibution-specific configuration utilities, setup is the default on RedHat. Mandrake 7.0 offers very nice DrakConf .

linuxconfig

(as root, either in text or graphical mode). You can access and change hundreds of setting from it. Very powerful–don’t change too many things at the same time, and be careful with changing entries you don’t understand.