Create a backup of what packages are currently installed:

dpkg --get-selections > package.txt

Then (on another system) restore installations from that list:

dpkg --clear-selections
sudo dpkg --set-selections < package.txt

To get rid of stale packages:

sudo apt-get autoremove

To get installed like at backup time (i.e. to install packages set by dpkg --set-selections):

sudo apt-get dselect-upgrade

Pour remplacer une touche par une autre. Je l'utilise pour ajouter les touches > et < qui ne sont pas sur mon clavier

xmodmap -pke > ~/.Xmodmap

xev | awk -F'[ )]+' '/^KeyPress/ { a[NR+2] } NR in a { printf "%-3s %s\n", $5, $8 }'

keycode 49 = greater less dollar numbersign leftdoublequotemark rightdoublequotemark endash paragraph

xmodmap ~/.Xmodmap