Ubuntu – Apache error “Could not reliably determine the server’s fully qualified domain name”

Apache2server

When I restart my Apache server using the command

sudo /etc/init.d/apache2 restart

I get the following error:

Restarting web server apache2
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName
... waiting apache2:
Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName

Is the server using 127.0.1.1 instead of 127.0.0.1? What causes this error?

Best Answer

  • 6# 13.04 and older

    This is just a friendly warning and not really a problem (as in that something does not work).

    If you go to:

    /etc/apache2/apache2.conf
    

    and insert:

    ServerName localhost   
    

    and then restart apache by typing into the terminal:

    sudo systemctl reload apache2
    

    the notice will disappear.

    If you have a name inside /etc/hostname you can also use that name instead of localhost.


    And it uses 127.0.1.1 if it is inside your /etc/hosts:

    127.0.0.1 localhost
    127.0.1.1 myhostname
    

    Preferred method

    Troubleshooting Apache

    If you get this error:

    apache2: Could not determine the server's fully qualified domain name, 
    using 127.0.0.1 for ServerName
    

    then use a text editor such as "sudo nano" at the command line or "gksudo gedit" on the desktop to create a new file,

    sudo nano /etc/apache2/conf.d/fqdn
    

    or

    gksu "gedit /etc/apache2/conf.d/fqdn"
    

    then add

    ServerName localhost
    

    to the file and save. This can all be done in a single command with the following:

     echo "ServerName localhost" | sudo tee /etc/apache2/conf.d/fqdn
    

    But on Ubuntu 14.04:

     echo "ServerName localhost" | sudo tee /etc/apache2/conf-available/fqdn.conf
     sudo a2enconf fqdn
    

    Don't forget the ".conf" (without will not work).

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