在Debian系统上卸载LNMP，可按以下步骤进行：
sudo systemctl stop nginx
sudo apt-get purge nginx nginx-common nginx-full
sudo rm -rf /etc/nginx /var/log/nginx /var/lib/nginx
sudo apt-get autoremove
sudo systemctl stop mysql
sudo apt-get purge mysql-server mysql-client mysql-common
sudo rm -rf /var/lib/mysql /etc/mysql
sudo apt-get autoremove
sudo apt-get purge php*
sudo rm -rf /etc/php /usr/lib/php /usr/include/php /var/lib/php
sudo apt-get autoremove
