- <option>--user</option> or <option>--global</option> is
- specified, this enables the unit for the system, for the
- calling user only or for all future logins of all
- users. Note that in the last case, no systemd daemon
+ <option>--user</option>, <option>--runtime</option>,
+ or <option>--global</option> is specified, this enables the unit
+ for the system, for the calling user only, for only this boot of
+ the system, or for all future logins of all users, or only this
+ boot. Note that in the last case, no systemd daemon