nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqh4xcdfyq02gr0zs058eqya09t88vyz3yqqdt8vwf0vsz2ur244zsmtqxrs hostname(1) is missing from the article. But that's one that's often replaced. Last I ...
Slackware also uses another implementation from Debian.
https://mirrors.slackware.com/slackware/slackware64-current/source/a/hostname/
https://mirrors.slackware.com/slackware/slackware64-current/source/a/hostname/