CAC

This is a helpful tool for setting up CAC access in linux.  Here is what I could find on it:

pcsc_tools

he pcsc_tools package provides an especially handy utility, pcsc_scan, which can help verify that your CAC reader really is talking to the OS, regardless of what any application is telling you:

$ pcsc_scan

The original way to install DoD root certificates, even on Windows XP, was to visit http://dodpki.c3pki.chamb.disa.mil/rootca.html and just click on each one to install.

Firefox Client Certificate Setup

1. Insert CAC into reader - the green light should flash.
   
2. Add CAC Module to Firefox as a Security Device
   1. Preferences Menu
   2. Advanced Section
   3. Encryption Tab
   4. Security Devices Button
   5. Load Button
   6. Enter CAC Module as the module name, and browse to /usr/lib/pkcs11/libcoolkeypk11.so for the module filename (or /usr/bin/libcackey.so or /usr/lib/libcackey.so if using the CACKey custom PKCS#11 library available from cackey).