FreeBSD: pkg_add sample

Now we demo how to use "pkg_add" to install packages.

The sample here is Nessus 4.2.0!

1. You must have the package: Nessus-4.2.0-fbsd7.tbz

2. Just type "pkg_add Nessus-4.2.0-fbsd7.tbz" in the command line as root.

3. Finished.... (so so fast!!)