Also this:
Fedora release 18 (Spherical Cow)
Kernel 3.6.10-8.fc18.armv7hl.omap on an armv7l (ttyO2)
panda-f18-v7hl login: jcm
Password:
Last login: Wed Jan 30 16:49:36 on ttyO2
[jcm@panda-f18-v7hl ~]$ pkexec ls
==== AUTHENTICATING FOR org.freedesktop.policykit.exec ===
Authentication is needed to run `/bin/ls' as the super user
Authenticating as: Jon Masters (jcm)
Password:
==== AUTHENTICATION COMPLETE ===
anaconda-ks.cfg install.log install.log.syslog
:)