.It Fl -version
Output version information and exit.
.El
+.Sh ENVIRONMENT VARIABLES
+.Bl -tag -width indent
+.It Ev NETNAME
+If no netname is specified on the command line with the
+.Fl n
+option, the value of this environment variable is used.
+.El
.Sh COMMANDS
.zZ
.Bl -tag -width indent
.It debug Ar N
Sets debug level to
.Ar N .
+.It log Op Ar N
+Capture log messages from a running tinc daemon.
+An optional debug level can be given that will be applied only for log messages sent to
+.Nm tincctl .
.It retry
Forces
.Xr tincd 8