[Unit] Description=Renewal ssh host certificate %i [Service] EnvironmentFile=/etc/default/ssh-cert-renew Type=oneshot ExecStart=/usr/local/bin/timer-mail -t ${ssh_cert_mail_to} -f ${ssh_cert_mail_from} -s "ssh certificate renewal %i" -ve \ /etc/systemd/ssh-cert-renew ${ssh_cert_sign_host} /etc/ssh/%i