scutil

• Access/modify config store

get

scutil --get HostName
scutil --get LocalHostName
scutil --get ComputerName

set

# primary hostname - fully qualified hostname e.g., mymac.domain.com
scutil --set HostName "new-hostname"

# bonjour hostname - usable only on the local network e.g., my-mac.local
scutil --set LocalHostName "new-hostname"

# computer name
scutil --set ComputerName "new-name"

dns

• Also: cat /etc/resolv.conf

# show DNS resolver servers
scutil --dns