В
~/.bashrc
добавить что-то типа:
echo " _ _ ___ _ _ _ "
echo " /\ /\___| | | ___ / \__ _ _ __ (_) | / \"
echo " / /_/ / _ \ | |/ _ \ / /\ / _` | '_ \| | |/ /"
echo "/ __ / __/ | | (_) | / /_// (_| | | | | | /\_/ "
echo "\/ /_/ \___|_|_|\___( ) /___,' \__,_|_| |_|_|_\/ "
echo " |/ "