Hostname
Set the hostname to your liking (e.g. arch):
# echo myhostname > /etc/hostname
Add the same hostname to /etc/hosts:
# nano /etc/hosts
# # /etc/hosts: static lookup table for host names # #<ip-address> <hostname.domain.org> <hostname> 127.0.0.1 localhost.localdomain localhost myhostname ::1 localhost.localdomain localhost # End of file
From：https://wiki.archlinux.org/index.php/Beginners%27_guide#Hostname