this this option has no effect when one of \fB--exit-without-bind\fR,
\fB--exit-after-bind\fR, or \fB--no-detach\fR is also given.
+.TP
+\fB-f\fR, \fB--force\fR
+By default, when \fB-P\fR or \fB--pidfile\fR is specified and the
+specified pidfile already exists and is locked by a running process,
+\fBcontroller\fR refuses to start. Specify \fB-f\fR or \fB--force\fR
+to cause it to instead overwrite the pidfile.
+
+When \fB-P\fR or \fB--pidfile\fR is not specified, this option has no
+effect.
+
.TP
.BR \-h ", " \-\^\-help
Prints a brief help message to the console.