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Using the Fingerprint Reader
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Using the Fingerprint Reader
With the ThinkFinger driver, SUSE
®
Linux* Enterprise Desktop supports the fingerprint reader by
UPEK/SGS Thomson Microelectronics included with some IBM and Lenovo ThinkPads. The same
fingerprint reader can also be found in other laptops and either as a stand-alone device or built into
some USB keyboards. For more details, refer to
http://thinkfinger.svn.sourceforge.net/viewvc/
*checkout*/thinkfinger/README.in (http://thinkfinger.svn.sourceforge.net/viewvc/*checkout*/
thinkfinger/README.in)
. After registering their fingerprint, users can log in to the system either by
swiping a finger on the fingerprint reader or by typing in a password.
If the hardware check detects the fingerprint reader integrated with your laptop (or connected to
your system), the packages
libthinkfinger
and
pam_thinkfinger
are automatically
installed. Use the command line tool
tf-tool
to register or verify a fingerprint for various users.
root
permission is required for this. The PAM module
pam_thinkfinger
supports user
authentication by fingerprint for the following applications and actions (although you might not be
prompted to swipe your finger in all cases):
Logging in to GDM or a login shell
Unlocking your screen on the GNOME desktop
Starting YaST and the YaST modules in the GNOME control center
Starting an application with
root
permission:
sudo
or
gnomesu
Changing to a different user identity with
su
or
su -
username
D.1 Registering a Fingerprint
Currently, only one fingerprint per user can be registered.
1
Open a shell and log in as
root
.
2
Run
tf-tool --help
to view the available options.
3
To register a fingerprint for a certain user, enter
tf-tool --add-user
login
tf-tool
prompts the user to swipe a finger until three readable fingerprints have been
gathered. The user's fingerprint data is then stored to
/etc/pam_thinkfinger/
login
.bir
.
4
If you want to use fingerprint authentication for starting YaST or the YaST modules in the
GNOME control center, register a fingerprint for
root
, too.
5
To verify an existing fingerprint for a certain user, enter
tf-tool --verify-user
login
6
Let the user swipe a finger.
tf-tool
compares the fingerprint to the print stored for this user
and provides a message if the fingerprints match.
As soon as the user's fingerprint has been successfully registered, the user can choose to authenticate
with either fingerprint or password.
To remove a user's fingerprint, delete the appropriate fingerprint file for this user:
/etc/
pam_thinkfinger/
login
.bir
.
Содержание LINUX ENTERPRISE DESKTOP 10 SP1 - GNOME 23-05-2007
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