i,v been searching the internet for a real noop tutorial on the subject but could not found any direct info. on how to edit these files the proper way.

i,v got a debian internet server that i use to host some personal domains and runs squid and rTorrent. the server is up and running with no problems but i am confused about a few things.

lets say that i named my server (foo), my domain is (example.com) and my public IP is 95.211.133.200 now:

1. should /etc/hostname contains:

   tango.example.com
   

   or

   tango <----- just the server name
   

2. should /etc/hosts contains:

   127.0.0.1       localhost.localdomain   localhost
   95.211.133.200  foo.example.com         foo
   

3. should /etc/resolf.conf contains (along with the nameservers) both:

   domain example.com
   search example.com
   

   or just the first one.

   are there any other files that i should edit in order to make things right?

4. last thing, the command:

   domainname
   
   returns: (none)
   

   i believe it should return (example.com). what should i do to correct that?