vipw
vigr
usermod
userdel
useradd
pwunconv
pwconv
pwck
nologin
newusers
lastlog
grpunconv
grpconv
grpck
groupmod
groupmems
groupdel
groupadd
faillog
chpasswd
deluser
delgroup
adduser
addgroup
mandb
catman
accessdb
update-passwd
dpkg-reconfigure
dpkg-preconfigure