Linux：彻底卸载nginx
1.先执行一下命令：
sudo apt-get --purge remove nginx
sudo apt-get autoremove
dpkg --get-selections|grep nginx
罗列出与nginx相关的软件， nginx-common deinstall 然后
sudo apt-get --purge remove nginx-common
这样就可以完全卸载掉nginx包括配置文件
2.ps -ef |grep nginx 看下nginx还有没有启动,一般执行完1后，nginx还是启动着的，如下：
yo@ubuntu:/$ ps -ef |grep nginx
root 4061 2418 0 Mar11 ? 00:00:00 nginx: master processsbin/nginx
nobody 4062 4061 0 Mar11 ? 00:00:00 nginx: worker process
yo 15487 4229 0 01:13 pts/0 00:00:00 grep --color=auto nginx
3.kill nginx进程
sudo kill -9 4061 4062
4.sudo find / -name nginx*
/usr/local/nginx
/usr/local/nginx/logs/nginx.pid
/usr/local/nginx/conf/nginx.conf.default
/usr/local/nginx/conf/nginx.conf
/usr/local/nginx/sbin/nginx
5.依依删除4列出的所有文件
sudo rm -r /usr/local/nginx
sudo rm -r /usr/local/nginx/logs/nginx.pid
sudo rm -r /usr/local/nginx/conf/nginx.conf.default
sudo rm -r /usr/local/nginx/conf/nginx.conf
sudo rm -r /usr/local/nginx/sbin/nginx
这样就彻底删除nginx了