.Ar host Ns Li . Ns Ar variable .
.It add Ar variable Ar value
As above, but without removing any previously existing configuration variables.
+If the variable already exists with the given value, nothing happens.
.It del Ar variable Op Ar value
Remove configuration variables with the same name and
.Ar value .
.Ar netname
is given, switch to that network.
Otherwise, display a list of all networks for which configuration files exist.
+.It fsck
+This will check the configuration files for possible problems,
+such as unsafe file permissions, missing executable bit on script,
+unknown and obsolete configuration variables, wrong public and/or private keys, and so on.
+.Pp
+When problems are found, this will be printed on a line with WARNING or ERROR in front of it.
+Most problems must be corrected by the user itself, however in some cases (like file permissions and missing public keys),
+tinc will ask if it should fix the problem.
.El
.Sh EXAMPLES
Examples of some commands: