我已经用以下命令卸载了 apache2：
sudo service apache2 stop
sudo apt-get purge apache2 apache2-utils apache2.2-bin apache2-common
sudo apt-get autoremove --purge
我发现了此命令剩下的内容：
whereis apache2
然后删除所有这些文件和目录。
现在，当我尝试安装 apache2 并运行它时出现错误：
sudo apt install apache2
sudo systemctl start apache2
Job for apache2.service failed because the control process exited with error code.
See "systemctl status apache2.service" and "journalctl -xe" for details.
sudo systemctl status apache2.service
● apache2.service - The Apache HTTP Server
Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Sun 2021-10-03 10:34:31 UTC; 2min 38s ago
Docs: https://httpd.apache.org/docs/2.4/
Process: 12449 ExecStart=/usr/sbin/apachectl start (code=exited, status=203/EXEC)
Oct 03 10:34:31 machina systemd[1]: Starting The Apache HTTP Server...
Oct 03 10:34:31 machina systemd[12449]: apache2.service: Failed to execute command: No such file or directory
Oct 03 10:34:31 machina systemd[12449]: apache2.service: Failed at step EXEC spawning /usr/sbin/apachectl: No such file or directory
Oct 03 10:34:31 machina systemd[1]: apache2.service: Control process exited, code=exited, status=203/EXEC
Oct 03 10:34:31 machina systemd[1]: apache2.service: Failed with result 'exit-code'.
Oct 03 10:34:31 machina systemd[1]: Failed to start The Apache HTTP Server.
apache2 -v
Server version: Apache/2.4.41 (Ubuntu)
Server built: 2021-09-28T11:00:45
apache2ctl -S
Command 'apache2ctl' not found, but can be installed with:
apt install apache2
Please ask your administrator.
然后我这样做：
sudo apt install apache2
但我遇到了同样的错误。
尝试过这个：
sudo apt-get --reinstall install apache2-bin
同样的错误。
答案1
这就是我解决这个问题的方法。
首先，您需要停止 Apache2 服务并将其完全卸载：
sudo service apache2 stop
sudo apt-get purge apache2 apache2-utils apache2.2-bin apache2-common
sudo apt-get autoremove --purge
在那之后重启你的机器然后才再次安装 Apache2：
sudo apt install apache2