<para>If <command>systemd-cgtop</command> is not connected to a
tty, no column headers are printed and the default is to only run
- one iteration. The <varname>--iterations=</varname> argument, if
+ one iteration. The <option>--iterations=</option> argument, if
given, is honored. This mode is suitable for scripting.</para>
<para>Resource usage is only accounted for control groups in the