Question

I have a string like first url, second url, third url and would like to extract only the url after the word second in the OS X Terminal (only the first occurrence). How can I do it?

In my favorite editor I used the regex /second (url)/ and used $1 to extract it, I just don’t know how to do it in the Terminal.

Keep in mind that url is an actual url, I’ll be using one of these expressions to match it: Regex to match URL

Answer 1

echo 'first url, second url, third url' | sed 's/.*second//'

Edit: I misunderstood. Better:

echo 'first url, second url, third url' | sed 's/.*second \([^ ]*\).*/\1/'

or:

echo 'first url, second url, third url' | perl -nle 'm/second ([^ ]*)/; print $1'