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Lennart Poettering authored
hostnamectl: if somebody invokes 'hostnamectl set-hostname' with a valid internet hostname unset the pretty name If people are unaware or uninterested in the concept of pretty host names, and simply invoke "hostnamectl set-hostname" for a valid internet host name, then use this as indication to unset the pretty host name and only set the static/dynamic one. This also allows fqdn, hence "hostnamectl set-hostname www.foobar.com" will just work if people really insist on using fqdns as hostnames.
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