"man security" gives very good advice on how to tune the security of your
FreeBSD system.

Want to find a specific port, just type the following under /usr/ports,
or one its subdirectories:

	"make search port="
    or
	"make search key=""

Want to see how much virtual memory you're using? Just type "swapinfo" to
be shown information about the usage of your swap partitions.

ports/net/netcat port is useful not only for redirecting input/output
to TCP or UDP connections, but also for proxying them. See inetd(8) for
details.

If other operating systems have damaged your Master Boot Record, you can
reinstall it either with /stand/sysinstall or with boot0cfg(8). See
"man boot0cfg" for details.

Need to see the calendar for this month? Simply type "cal".  To see the
whole year, type "cal -y".
		-- Dru 

Need to quickly return to your home directory? Type "cd".
		-- Dru 

To see the last time that you logged in, use lastlogin(8).
		-- Dru 

To clear the screen, use "clear". To re-display your screen buffer, press
the scroll lock key and use your page up button. When you're finished,
press the scroll lock key again to get your prompt back.
		-- Dru 

To save disk space in your home directory, compress files you rarely
use with "gzip  filename".
		-- Dru 

To read a compressed file without having to first uncompress it, use
"zcat" or "zmore" to view it.
		-- Dru 

To see how much disk space is left on your partitions, use

	df -h
		-- Dru 

To see the 10 largest files on a directory or partition, use

	du /partition_or_directory_name | sort -rn | head
		-- Dru 

To determine whether a file is a text file, executable, or some other type
of file, use

	file filename
		-- Dru 

Time to change your password? Type "passwd" and follow the prompts.
		-- Dru