Ralph Angenendt wrote:
Frédérique Da Luene wrote:
Useradd newuser : ok passwd newuser : ok
The password is not MD5, only 3DES.
Again: Have you looked if passwd on your machine is the one from CentOS?
I would suggesting copying the binary to a known clean machine to check the md5sum to verify. If you might have been hacked, you can't check the md5 on that box.