Hidden features of FreeBSD?
Solution 1:
I've accidentally found in the source of cp command (FreeBSD 7.2); the SIGINFO signal handler: if you press Ctrl+T while cp is copying something huge, you will see (along with other info) the progress of the operation in percent!
Solution 2:
Documentation! The manual pages, which lie midway between the brevity and vagueness that typifies Linux documentation, and the overtechnical detail of Solaris manpages. The handbook, which helps people who are new to systems administration, new to FreeBSD, or even new to Unix get started.