::change user informations::

how to change user informations (finger) such as:

Shell:
Full Name:
Office Location:
Office Phone:
Home Phone:
Other information:

this can be done using command: chfn

::change window manager::

how to change window manager in Linux
$ xwmconfig

selection to change to or from:

kde - K Desktop Environment
xfce - The Cholesterol Free Desktop Environment
fluxbox - Fluxbox window manager
blackbox - Blackbox window manager
wmaker - WindowMaker
fvwm2 - F Virtual Window Manager 2
twm - Tab Window Manager

run this command as a normal user, no special permission needed