For developers. I had the same error, also until i installed libpam- smbpass.
I don't use samba/cifs. For the record, here is the error: Apr 14 19:42:24 shinehard sudo: PAM unable to dlopen(/lib/security/pam_smbpass.so) Apr 14 19:42:25 shinehard sudo: PAM [error: /lib/security/pam_smbpass.so: cannot open shared object file: No such file or directory] Apr 14 19:42:25 shinehard sudo: PAM adding faulty module: /lib/security/pam_smbpass.so Apr 14 19:42:28 shinehard sudo: linshine : TTY=pts/8 ; PWD=/home/linshine ; USER=root ; COMMAND=/bin/su Apr 14 19:42:28 shinehard sudo: pam_unix(sudo:session): session opened for user root by linshine(uid=0) Apr 14 19:42:29 shinehard sudo: pam_unix(sudo:session): session closed for user root Apr 14 19:42:29 shinehard su[9996]: PAM unable to dlopen(/lib/security/pam_smbpass.so) Apr 14 19:42:29 shinehard su[9996]: PAM [error: /lib/security/pam_smbpass.so: cannot open shared object file: No such file or directory] Apr 14 19:42:29 shinehard su[9996]: PAM adding faulty module: /lib/security/pam_smbpass.so Apr 14 19:42:29 shinehard su[9996]: Successful su for root by root Apr 14 19:42:30 shinehard su[9472]: + pts/8 root:root -- error in auth.log when switch user https://bugs.launchpad.net/bugs/216990 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs