Apache server FQDN warning

Had this issue on Ubuntu/Debian linux:

$ sudo /etc/init.d/apache2 reload
 * Reloading web server config apache2
 apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName

Fix is pretty trivial:

$ sudo sh -c 'echo "ServerName localhost.localdomain" > /etc/apache2/conf.d/server_name'
$ sudo /etc/init.d/apache2 reload
 * Reloading web server config apache2 [ OK ]
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