Question

I do some research on how to replace text between delimiters, but because of lack knowledge in awk and sed I couldn’t adjust command for my problem. The most similar question I found here, but after adjusting command to awk '/^(name=|&)/{f=f?0:1}f&&/*/{$0="//" $0}1' file it didn’t work. Also, I would like do replace using variable instead of doing replace in file. And if I didn’t ask to much, very short explanation would be great 🙂

I have next url in variable $url and variable $new=unnamed384:

http://www.example.com/?name=unnamed293&file=4

I need to replace text between “name=” and “&” with variable $new.
E.g. This is variable $url before:

http://www.example.com/?name=unnamed293&file=4

This is variable $url after:

http://www.example.com/?name=unnamed384&file=4

Answer 1

How about:

$ new="unnamed384"

$ url="http://www.example.com/?name=unnamed293&file=4"

$ sed "s/name=[^&]*/name=$new/" <<< $url
http://www.example.com/?name=unnamed384&file=4