Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] GNOME (GNU Netowrk Object Model Environment graphical logins graphical logouts 2nd grep command 2nd regular expressions format group permissions changing 2nd groups GUIs X Windows System loading server functionality starting gunzip utility gzcat utility gzip command |