使用 sudo apt-get uninstall 是不够的，那会保留配置.
要完全卸载，请使用 sudo apt-get purge apache2.

It is not enough to use sudo apt-get uninstall, that will keep the configuration.
For a complete uninstall, use sudo apt-get purge apache2.

您可能也有兴趣阅读 Ubuntu Stack Exchange 网站上的此问答，其中涵盖了相同的问题.

You may also be interested in reading this Q&A on the Ubuntu Stack Exchange site, which covers the same problem.