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Harald Markus Wirth

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Install PAM USB (Ubuntu Jaunty)

Plug and mount your USB flash disk before calling pamusb-conf (a hidden folder .pamusb will be created).

sudo apt-get install libpam-usb pamusb-tools
sudo pamusb-conf --add-device dummy name
sudo pamusb-conf --add-user login name


Add one line:

# /etc/pam.d/common-auth - authentication settings common to all services
# This file is included from other service-specific PAM config files,
# and should contain a list of the authentication modules that define
# the central authentication scheme for use on the system
# (e.g., /etc/shadow, LDAP, Kerberos, etc.).  The default is to use the
# traditional Unix authentication mechanisms.
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules.  See
# pam-auth-update(8) for details.

# here are the per-package modules (the "Primary" block)
auth   sufficient            
auth	[success=1 default=ignore] nullok_secure
# here's the fallback if no module succeeds
auth	requisite
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
auth	required
# and here are more per-package modules (the "Additional" block)
# end of pam-auth-update config

Check, if it works with:

pamusb-check <username>


If you never want to have to enter your password, not even after booting, you could either use Gnome's auto-login feature, or mount the SSD drive via fstab.

Pad checking failed

Sometimes pamusb stopped authenticating with the message "Pad checking failed". In this case, issuing the following command helped me:

rm ~/.pamusb/*

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