If you trust everyone who has physical access to a pc (if not then you are encrypting your files, right?) then there seems little point in having to type a password just because more than one user uses the pc.
So here’s how to log in from the gdm “face browser” with a single click. Instructions tested with Ubuntu 8.04 Hardy Heron and 8.10 Intrepid Ibex.
As root, create a new file containing the usernames of all the users you want be able to log in through gdm without entering a password:
sudo -i echo 'username' >> /etc/gdm/nopassusers
now still as root modify the pam settings for gdm to check this file and allow this user in based on being in the list:
and modify to contain the new listfile item
#%PAM-1.0 auth requisite pam_nologin.so auth required pam_env.so readenv=1 auth required pam_env.so readenv=1 envfile=/etc/default/locale **auth sufficient pam_listfile.so item=user sense=allow file=/etc/gdm/nopassusers onerr=fail** #add this line @include common-auth auth optional pam_gnome_keyring.so @include common-account session required pam_limits.so @include common-session session optional pam_gnome_keyring.so auto_start @include common-password
now simply restart gdm (or the whole machine) and try your new one-click login
This means the keyring isn’t unlocked, so you may have to type in your password anyway before your wireless connects.