I upgraded my dedicated server from ubuntu 11.1 to ubuntu 12.04. After the server upgrade says 'unable to initialize PAM: No such file or directory' when i am going to change the user to sudo. I got this solution which is saying to make the
/etc/pam.d/common-session-noninteractive file manually.
But this thing cannot be done as i do not have the permission to change the super user. Can any one help on this.