查看FreeBSD版本： uname -a
root# uname -a
FreeBSD power 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:36:49 UTC 2010 root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
查看apache版本： apachectl -v
root#apachectl -v
Server version: Apache/2.2.15 (FreeBSD)
Server built: Nov 26 2010 16:07:59
查看php版本：php -v
root#php -v
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies
with Zend Extension Manager v1.2.2, Copyright (c) 2003-2007, by Zend Technologies
with Zend Optimizer v3.3.0, Copyright (c) 1998-2007, by Zend Technologies
查看php模块：php -m
查看mysql版本：mysql -V（大写V哦）
root#mysql -V
mysql Ver 14.14 Distrib 5.1.53, for portbld-freebsd8.1 (amd64) using 5.2