How i configure my /etc/host on Ubuntu?

Hi, i created hostname: ‘’, but, how i configure the etc/host?

My actual hosts is this localhost mysite mysite

Is correct?

But when i execute

sudo service hostname restart

This error appears:

stop: Unknow instance 
hostname stop/waiting

The command hostname return and the hostname -f return

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That’s fine, the hostname service runs hostname -b -F /etc/hostname (see /etc/init/hostname.conf) which exits after setting the hostname, so it doesn’t continue running.

Your /etc/hosts file looks proper, are you experiencing any issues with your hostname config?

I am having similar issue where I am unable to stop a service ( i am trying to stop freeradius )

stop: Unknown instance: