在ubuntu9.10上使用指纹识别

把下面这几个包装上：
    libpam-thinkfinger thinkfinger-tools libthinkfinger-doc libthinkfinger0 libthinkfinger-dev
然后
    sudo tf-tool --acquire
测试是否正常获取指纹数据，需要正确的刷3遍即可通过。
一般显示如下图所示：

squall@squall-laptop:~$ sudo tf-tool --acquire
[sudo] password for squall:

ThinkFinger 0.3 (http://thinkfinger.sourceforge.net/)
Copyright (C) 2006, 2007 Timo Hoenig <[e-mail]>

Initializing... done.
Please swipe your finger (successful swipes 3/3, failed swipes: 0)... done.
Storing data (/home/spark/.thinkfinger.bir)... done.

生成的认证文件的位置：~/.thinkfinger.bir。
    sudo tf-tool --verify
测试能否正确验证指纹，需要正确的刷1遍即可通过。

squall@squall-laptop:~$ sudo tf-tool --verify

ThinkFinger 0.3 (http://thinkfinger.sourceforge.net/)
Copyright (C) 2006, 2007 Timo Hoenig <[e-mail]>

Initializing... done.
Please swipe your finger (successful swipes 1/1, failed swipes: 1)... done.
Result: Fingerprint does match.

把~/.thinkfinger.bir拷贝到/etc/pam_thinkfinger下，并改成登录用户的名字，如我的是：

sudo cp ~/.thinkfinger.bir /etc/pam_thinkfinger/squall.dir

修改/etc/pam.d/common-auth文件，在pam_unix2.so这一行的前面加入pam_thinkfinger.so 例如我的就是：

auth sufficient pam_thinkfinger.so
# here are the per-package modules (the "Primary" block)
auth[success=1 default=ignore]pam_unix.so nullok_secure
# here's the fallback if no module succeeds
authrequisitepam_deny.so
# 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
authrequiredpam_permit.so
# and here are more per-package modules (the "Additional" block)
# end of pam-auth-update config