You can detach a process from terminal by adding &! at the end of a command !
Thank you brieuc !

echo "NICK pingbot" > pingbot.input # what nick
echo "USER pingbot +iw pingbot :$0" >> pingbot.input
echo "JOIN #tdobson.net" >> pingbot.input # what channel

tail -f pingbot.input | telnet irc.freenode.net 6667

Lots of doc about shell script

If you’re lucky enough to find a command execution vulnerability during a penetration test, pretty soon afterwards you’ll probably want an interactive shell.

Some useful commands

Here a sample command to do text to speech
echo "Hello" | festival --tts

colout is a simple command to add colors to a text stream in your terminal.

cheat allows you to create and view interactive cheatsheets on the command-line. It was designed to help remind *nix system administrators of options for commands that they use frequently, but not frequently enough to remember.

a web server in bash using netcat

Pour avoir directement la liste des solutions dès le premier appui sur la touche TAB il faut rajouter "set show-all-if-ambiguous on" dans votre fichier "~/.inputrc"

A real gui terminal for your shell !!!
http://www.crowd42.info/essayez-final-term-un-terminal-tres-moderne
(via http://links.zirko.me/)

Some bad script

En les mettant après le script

how to sur bash

Type it yourself !