Add an attribute using xmllint

Question

I want to add an attribute to the tag, using xmllint. Can I do this is through xmllint?

Answer 1

Xmllint in not made to edit XML, so I think the answer is “no, you can't”.

To edit XML, you can use XMLStarlet, the syntax to add an attribute into existing XML document is:

xmlstarlet ed -L -i xpath -t attr -n name -v value file