I need to install xmllint, but don't know how to

I want to install xmllint, but don’t know how. I’m running Ubuntu LTS 20.04.

>Solution :

The tool xmllint is part of the libxml2-utils package

As superuser run:-

#apt -y install libxml2-utils

and the xmllint tool will become available
e.g.

xmllint --format your.xml