Hi, This warning also appear on my system when login is attempted through various programs (login, su, gdm-password, ..).
Oct 06 12:37:30 XXX login[9367]: pam_unix(login:auth): Couldn't open /etc/securetty: No such file or directory Oct 06 12:37:40 XXX su[9383]: pam_unix(su:auth): Couldn't open /etc/securetty: No such file or directory Oct 06 12:37:56 XXX gdm-password][9612]: pam_unix(gdm-password:auth): Couldn't open /etc/securetty: No such file or directory Note someone also reported this as a login bug. This was closed since this seems to originate from libpam so "there is nothing login can do about that". https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931899 So it would be good to address this within libpam-runtime. A quick look at the implementation shows the file is written by perl script /usr/sbin/pam-auth-update, using a template from /usr/share/pam-configs/unix ii debconf 1.5.73 ii libpam-runtime 1.3.1-5 ii login 1:4.7-2 Guillaume