/SHUN [[!][+|-][$<type>]<mask> [[<target>] <expiration> :<reason>]]

Sets (+), removes (-) or lists shuns. The target can either be specified
as * for a global shun (all servers) or a specific server can be
specified for a local shun confined to the specified server. The <type>
argument can be used to Shun user Realnames by using $R. The expiration
can be specified either in seconds or as a formatted time, eg 2d5m3s
(2 days 5 minutes 3 seconds. If the mask would not be permitted due
to it being too wide or affecting too many users, the "!" prefix may be
used to force the Shun to be set anyway.

See Also: GLINE, ZLINE
