Change ".local" at the end of a hostname

I am trying to change the ".local" suffix on my Server's Hostname but i can't find the file that contains it.

My router has ".iad" at the end of it so i suppose it would be possible to change it to something like ".com".

/etc/hostname just says:

toshiba-pc


and /etc/hosts just says:


10.0.0.11 toshiba-pc # Added by NetworkManager
127.0.0.1 localhost.localdomain localhost
::1 toshiba-pc localhost6.localdomain6 localhost6
127.0.1.1 toshiba-pc

# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts


Could somebody help me.

Thanks