+.B linkname \fIname\fR
+Sets the logical name of the link to \fIname\fR. Pppd will create a
+file named \fBppp-\fIname\fB.pid\fR in /var/run (or /etc/ppp on some
+systems) containing its process ID. This can be useful in determining
+which instance of pppd is responsible for the link to a given peer
+system. This is a privileged option.
+.TP