Server related commands such as user modes, joining channels, and changing nicks, can all be found here. A full listing of what is returned from /helpop.

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/|\ Anope \|/ Unreal /|\

[ UserCMDS | OperCMDS | SVSCMDS | UModes | ChModes | SnoMasks | OFlags | ExtBans ]

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-OperCMDS-

DCCDENY

Adds a DCC Deny for that Filename mask. This means that any
DCC sends of Files matching that Filename mask will be rejected.
IRC Operator only command

Syntax: DCCDENY <filename mask> <reason>