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I have got fresh Ubuntu Server 18.04.2 LTS, then I install apache2, using sudo apt-get apache2 install. But I was not able to run apache using sudo service apache2 stop/start/restart because of errors:

make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down

This gave me the thing that port 80 is busy because some process uses it. When I tried sudo netstat -ltnp | grep '80' there always was the httpd process, even after I completely deleted the apache:

tcp6       0      0 :::80                   :::*                    LISTEN      107986/httpd

What is this httpd process ? Why I can't run the apache ?

The process info is:

4 S root      17522  17492  0  80   0 - 13757 -       4940   0 09:47 ?        00:00:00 httpd -d /snap/nextcloud/13144 -k start -DFOREGROUND
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    I think that comes pre-installed in the server edition! – George Udosen May 16 at 10:00
  • Do you mean apache preinstalled ? or some httpd ? As I see now apache is not preinstalled, but httpd process is there – Mikael May 16 at 10:01
  • Run sudo systemctl status apache2! – George Udosen May 16 at 10:09
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The problem was because there was installed nextcloud and used port 80. I was removed nextcloud because I don't need it.

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