After a recent update in Arch Linux, which required updating /etc/passwd, /etc/shadow, and /etc/pam.d/login, I have started being prompted for my login password twice at boot up. I boot to runlevel 3, login, and start my window manager manually with startx. The prompt I'm talking about is in the basic shell.
I enter my username, then am prompted for my password, which I enter. Then an identical password prompt appears. I enter my password again, and am successfully logged in.
Any suggestions troubleshooting this?
Best Answer
There is a module in PAM that deals with user authentication called
pam_unix.so. It will be mentioned in a file calledcommon-author simplyauthin the directory/etc/pam.d/. There may be multiple entry there or perhaps the update could have modified it in some way. Can you post the lines in the file here? If you cannot find it, you have to search for the file that is identical tocommon-authin arch-linux.You can read about pam and the modules.