A further serious answer for those unfamiliar, the .so files are all found in a PAM module search path. You can replace a search-path-relative path (pam_blah.so

A further serious answer for those unfamiliar, the .so files are all found in a PAM module search path. You can replace a search-path-relative path (pam_blah.so) with an absolute path to a .so file if you wish. auth required /etc/whatever/my_pam_module.so