thank you for your response.
I am now studying the users guide as suggested.
In section 3.2 of the users guide, it provides the essential Yocto Project host packages. My host is running Ubuntu 20.04 as recommended in section 3. However, the list of essential host packages listed in section 3.2 appears incorrect or out-of-date. Here is the output I get:
Note, selecting 'git' instead of 'git-core'
Note, selecting 'python-is-python2' instead of 'python'
Note, selecting 'pylint' instead of 'pylint3'
E: Unable to locate package pzstd
E: Unable to locate package lz4c
Are pzstd and lz4c really required or is the Users Guide wrong?