shelluser_blacklist

root
daemon
bin
sys
sync
games
man
lp
mail
news
uucp
proxy
www-data
wwwrun
apache
backup
list
irc
gnats
nobody
Debian-exim
statd
identd
sshd
mysql
postgres
postfix
clamav
amavis
vmail
getmail
ispconfig
courier
dovecot
mongodb