Describe Linux/SlowLoginAndSudo here.

 * Unsolved 2021-06 - https://access.redhat.com/discussions/4614241

 * https://unix.stackexchange.com/questions/602231/why-is-sudo-su-slow-without-all-root-in-etc-sudoers

 * https://forums.centos.org/viewtopic.php?t=72562

 * Possible solution - https://unix.stackexchange.com/questions/602231/why-is-sudo-su-slow-without-all-root-in-etc-sudoers {{{
 /etc/sudoers.d/central_ user:
central_user ALL = NOPASSWD: /bin/su
}}}

    journalctl -f
    ... dbus[5555]: [system] Connection has not authenticated soon enough, closing it (auth_timeout=30000ms, elapsed: 30017ms)
    ...
    ... [system] Failed to activate service 'org.freedesktop.login1': timed out