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Get all IPs via ifconfig

Terminal - Get all IPs via ifconfig
ifconfig -a | perl -nle'/(\d+\.\d+\.\d+\.\d+)/ && print $1'
2009-07-31 09:49:17
User: sneaker
Functions: ifconfig perl
12
Get all IPs via ifconfig

works on Linux and Solaris. I think it will work on nearly all *nix-es

Alternatives

There are 7 alternatives - vote for the best!

Terminal - Alternatives
ifconfig | perl -nle'/dr:(\S+)/ && print $1'
2009-07-23 09:33:31
User: xsawyerx
Functions: ifconfig perl
11

Fetches the IPs and ONLY the IPs from ifconfig. Simplest, shortest, cleanest.

Perl is too good to be true...

(P.S.: credit should go to Peteris Krumins at catonmat.net)

Know a better way?

If you can do better, submit your command here.

What others think

you can shrink the regex a little since the first three numbers have the same pattern:

ifconfig -a | perl -nle'/((\d+\.){3}\d+)/ && print $1'

(tested it, and it works on my system.)

Comment by bwoodacre 312 weeks and 6 days ago

Using awk:

ifconfig -a | awk '/[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\./ { sub(/addr:/,""); print $2 }'

Works on AIX & Linux

Comment by KevinM 312 weeks and 3 days ago

Confirmed: this works in the Mac terminal as well.

Comment by mathias 290 weeks and 1 day ago

That's works too:

ifconfig -a | grep inet | grep -E '([[:digit:]]{1,2}.){4}' | awk '{print $2}'
Comment by evenme 282 weeks and 6 days ago

Your point of view

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