Arnaud

Below are some bash tips without any explanation, just read the reference₁ for further information.

(for mpc users but one can customize bash completion for other uses)

$ mpc help | awk '$0 !~ /Displays status/ && $0 !~ /Usage/ && $0 !~ /mpc version/ && $0 !~ /For more/  {print $2}' > mpc.words 
$ complete -W "$(cat mpc.words)" mpc
$ mpc [TAB]
add          crossfade    enable       ls           next         play         random       save         shuffle      toggle       
clear        del          listall      lsplaylists  outputs      playlist     repeat       search       stats        update       
crop         disable      load         move         pause        prev         rm           seek         stop         volume       

Many people know C-r for a incremental backwards-search through history. There are other keys combinations like M-p which allows a non-incremental search for a string.
M-p, type a string then press Return and it will fill with a match.

$ cat > hostfile
google.fr
opera.com   
jamendo.com
$ export HOSTFILE=hostfile
$ @ [TAB]
@localhost  @localhost.localdomain  @google.fr  @jamendo.com @opera.com
$ complete -W "$(cat $HOSTFILE)" ping
$ ping [TAB]
google.fr    jamendo.com  opera.com    

---
1: $ man bash