nixos-images/nix/restore-remote-access.nix

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{
# Restore ssh host and user keys if they are available.
# This avoids warnings of unknown ssh keys.
boot.initrd.postMountCommands = ''
mkdir -m 700 -p /mnt-root/root/.ssh
mkdir -m 755 -p /mnt-root/etc/ssh
mkdir -m 755 -p /mnt-root/root/network
if [[ -f ssh/authorized_keys ]]; then
install -m 400 ssh/authorized_keys /mnt-root/root/.ssh
fi
install -m 400 ssh/ssh_host_* /mnt-root/etc/ssh
cp *.json /mnt-root/root/network/
if [[ -f machine-id ]]; then
cp machine-id /mnt-root/etc/machine-id
fi
'';
}