I have Ubuntu 10.04 installed on my system. Recently, I was swapping out hard drives and, when I rebooted my system, I could not log in. I would enter my username and password; then the system would return immediately to the login screen and prompted the error message:
Module is Unknown.
I found that I was missing seven
pam_*.so files from
/lib/security (although I do not know why). It happened immediately after I removed a secondary drive.
- Can I simply reload the missing files manually?
- Is there something that I did to cause the files to disappear (strong word, disappear!)?