Because I don’t knowubuntu16.04 has installedapacheandmysqlby default, and I deleted allapache* in the system due to my handicap.file, the specific deletion steps are as follows:

$ sudo apt-get --purge remove apache-common $ sudo apt-get --purge remove apache $ sudo find /etc -name "*apache*" |xargs rm -rf $ sudo rm -rf /var/www $sudo rm -rf /etc/libapache2-mod-jk

After deletion is complete, reinstall:

$ sudo apt-get install apache2

However, the problem arises. When accessinglocalhostin the browser, the result is as follows:

When trying to restart theapacheservice:

Then, I checked the/etc/apache2directory and found that theapacheconfiguration fileapache2.conf
## was missing.

#And, the folders are all empty.

The reason seems to be this. When I deleted it before, I deleted all the

apache*files, but reinstallingapachedid not generate these necessary files, so There is noapacheconfiguration file or anything like that.

How can I make the newly installedapachework, or restore it to theapachebefore deletion? I beg God to answer!