[root@notebook ~]# grep USER /etc/shadow
USER:!!:16577:1:90:7:::
[root@notebook ~]#
[root@notebook ~]# su - USER
[USER@notebook ~]$ id
uid=1000(USER) gid=983(GROUPN) groups=983(GROUPN),10(wheel) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
[USER@notebook ~]$ passwd
Changing password for user USER.
Changing password for USER.
(current) UNIX password:
passwd: Authentication token manipulation error
[USER@notebook ~]$