vipw
vigr
usermod
userdel
lastlog
grpck
groupmod
groupmems
groupdel
groupadd
faillog
apt-config
apt-cdrom
apt-cache
validlocale
deluser
delgroup
adduser
addgroup
mandb
catman
accessdb
update-passwd
savelog
run-parts
remove-shell
installkernel
add-shell