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In Linux, using a Bash Terminal, I can do:
hostname -d to display the name of the DNS domain, and hostname -i to display the network address(es) of the hostname . How can I retrieve the same information--preferably using a single command (with option, if needed), and without having to elevate privileges--from a Bash terminal in Mac OS X?
For reference, here's the Bash Version I'm using in Mac OS X:
For the hostname -d, use hostname -f:
hostname -f | sed -e 's/^[^.]*\.//'
For IP-addresses, use ifconfig -a (look for the inet data). Your machine may have only one network device, en0, so you could do just
ifconfig en0 |awk '/inet / {print $2; }'
If you are interested in all of the network devices, keep in mind that ifconfig -l lists the devices. This lists the devices and their correspond addresses:
#!/bin/sh
for name in $(ifconfig -l)
do
ifconfig $name |awk -v name=$name '/inet / {printf "%s: %s\n", name, $2; }'
done
Further reading:
hostname -d returns the name of the DNS domain, e.g. : department.business.com. Also, hostname and hostname -f are functionally the same in OS X. hostname -i returns a network address (IP), e.g. 127.0.0.1. Your suggestion doesn't quite do what I'd like.
hostname -f with sed is an acceptable solution, as it parses out the DNS domain. Using ifconfig, though, returns the IP address, not the host IP.
I am using
scutil --dns | grep 'search domain' | head -n 1 | grep -o '[a-zA-Z0-9.-]\+$'
which seems to work under some circumstances better but YMMV. I make this an alias in my profile (for mac only) to dnsdomainname which works on Linux (in place of hostname -d).
ipconfig getifaddr $(route get 8.8.8.8 | awk '/interface: / {print $2; }')
Use 'dig'. Search for commands similar to whois
dig hostname => both hostname + ipaddy
dig ip.address => not as complete
