Chapter 9 - Email Servers - Configuring an email alias

I have taken the LFCS multiple times and several of the topics led me to to add the LFS211 class to the list of courses one should probably take prior to attempting this LFCS. My last email admin experience goes back to sendmail in the 90's so postfix and dovecot are not my forte - and I see Tecmint attempting to offer input that is not super refined on this topic. Something like:
1. Determine where aliases are configured with "postconf alias_maps". (Configurable, but in this case my system returns /etc/aliases).
2. Create the alias in alignment with the man page - "joe: joe@joes.preferred.machine" or perhaps "root: joe" so someone is reviewing root's email would be a really relevant System Admin type thing to do.
3. Run "newaliases" to pick up the changes.