How to find the Hostname and Domain name on Mac or Linux

To find the hostname on a Mac, simply do as one would on a Linux box;

hostname

To find the domain name on a Mac, we can do as we would on a Linux box also;

cat /etc/resolv.conf

The following may also help on a Mac;

scutil --dns

It may also be worth looking under the Search Domains section;

System Preferences >> Network >> [Select NIC] >> Advanced  >> DNS

On Linux, we can also do the following;

domainname - not always set for some reason, especially on my Slackware systems.

dnsdomainname - This shows on my Slackware systems.

nisdomainname - not always set for some reason, especially on my Slackware systems.

ypdomainname - not always set for some reason, especially on my Slackware systems.