[root@localhost ~]# id user1
uid=500(user1) gid=500(user1) groups=500(user1)
[root@localhost ~]# passwd user1
Changing password for user user1.
New UNIX password:
BAD PASSWORD: it does not contain enough DIFFERENT characters
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
[root@localhost ~]# ftp localhost
Connected to localhost.localdomain.
220 Welcome to yuyuyou FTP service.
530 Please login with USER and PASS.
530 Please login with USER and PASS.
KERBEROS_V4 rejected as an authentication type
Name (localhost:root): user1
530 This FTP server is anonymous only.
Login failed.