[root@centos7 tmp]# vi /etc/ftpusers
[root@centos7 tmp]# cat /etc/ftpusers
root
bin
daemon
adm
lp
sync
shutdown
halt
mail
uucp
operator
gopher
nobody
dbus
vcsa
rpc
nscd
tcpdump
haldaemon
apache
nslcd
postfix
avahi
ntp
rpcuser
sshd
gdm
vboxadd
named