方法1
使用‘sudo apt-get –purge remove nginx’彻底删除
# sudo service nginx stop
# sudo apt-get --purge remove nginx
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
fontconfig-config fonts-dejavu-core libfontconfig1 libgd3 libjbig0 libjpeg-turbo8 libjpeg8
libnginx-mod-http-image-filter libnginx-mod-http-xslt-filter libnginx-mod-mail
libnginx-mod-stream libtiff5 libwebp6 libxpm4 libxslt1.1 nginx-common nginx-core
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
nginx*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 45.1 kB disk space will be freed.
Do you want to continue? [Y/n] y
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LC_CTYPE = "UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("en_US.UTF-8").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
(Reading database ... 117708 files and directories currently installed.)
Removing nginx (1.18.0-0ubuntu1) ...
方法2
自动移除全部不使用的软件包
sudo apt-get autoremove
列出与nginx相关的软件，并依次删除显示的软件，这个方法更加通用，我照猫画虎使用在php上面，也非常靠谱（php8.0-fpm）
dpkg --get-selections|grep nginx
sudo apt-get --purge remove nginx
sudo apt-get --purge remove nginx-common
sudo apt-get --purge remove nginx-cor
使用ps命令查看相关进程,-A显示有限信息，-l显示详细信息 -e显示所有进程，aux显示系统所有进程
ps -le ｜ grep nginx
参考材料如下
https://blog.csdn.net/adley_app/article/details/79223221
ps命令
http://c.biancheng.net/view/1062.html
删除apache2
https://blog.csdn.net/dazhi_100/article/details/43121179