killall nginx
/etc/init.d/mysql stop
killall mysqld
/usr/local/php/sbin/php-fpm stop
killall php-cgi
rm -rf /usr/local/php
rm -rf /usr/local/nginx
rm -rf /usr/local/mysql
rm -rf /usr/local/zend
rm /etc/my.cnf
rm /etc/init.d/mysql
rm /root/vhost.sh
rm /root/lnmp

文章来源:http://www.centos.bz/2011/07/howto-remove-lnmp/