systemd/tmpfiles.d/provision.conf
Lennart Poettering 4cebd207d1 tmpfiles: add lines for provisioning ssh keys for root by default
With this, I can now easily do:

    systemd-nspawn --load-credential=ssh.authorized_keys.root:/home/lennart/.ssh/authorized_keys --image=… --boot

To boot into an image with my SSH key copied in. Yay!
2022-09-23 09:30:00 +02:00

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# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
# See tmpfiles.d(5) for details
# Provision additional login messages from credentials, if they are set. Note
# that these lines are NOPs if the credentials are not set or if the files
# already exist.
f^ /etc/motd.d/50-provision.conf - - - - login.motd
f^ /etc/issue.d/50-provision.conf - - - - login.issue
# Provision a /etc/hosts file from credentials.
f^ /etc/hosts - - - - network.hosts
# Provision SSH key for root
d /root :0700 root :root -
d /root/.ssh :0700 root :root -
f^ /root/.ssh/authorized_keys :0600 root :root - ssh.authorized_keys.root