These are taken from the UnrealIRCD general command reference.

NOTE: All commands begin with a /

**** NICK Command ***

Changes your "Online Identity" on a server. All those in the channel you are in will be
alerted of your nickname change.

Syntax: NICK Example: NICK hAtbLaDe1

*** WHOIS Command ***

Shows information about the user in question, such as their "Name", channels they are
currently in, their hostmask, etc.

Syntax: WHOIS Example: WHOIS hAtbLaDe

*** WHO Command ***

Searches User Information (-i users only) for supplied information. IRCops are able to
search +i users & can use masks only. When used on a channel , it will give a list of
all the non-invisible users on that channel.

Syntax: WHO WHO WHO <#channel> WHO 0 o (Lists all Online IRC Operators currently online and not +i)
Example: WHO *.aol.com
WHO *Bot*
WHO #UnrealIRCd

*** WHOWAS Command ***

Retrieves previous 'WHOIS' information for users no longer connected to the server.

Syntax: WHOWAS WHOWAS Example: WHOWAS hAtbLaDe

*** NAMES Command ***

Provides a list of users on the specified channel.

Syntax: NAMES Example: NAMES #Support

*** ISON Command ***

Used to determine of a certain user or users are currently on the IRC server based upon
their nickname.

Syntax: ISON Example: ISON hAtbLaDe NickServ ChanServ OperServ MemoServ

*** JOIN Command ***

Used to enter one or more channels on an IRC server. All occupants of the channel will be
notified of your arrival. JOIN with 0 as a parameter makes you Part all channels.

Syntax: JOIN ,, JOIN 0 (Parts all channels)
Example: JOIN #Support
JOIN #Support,#Lobby

*** PART Command ***

Used to part (or leave) a channel you currently occupy. All those in the channel will be
notified of your departure.

Syntax: PART ,,, Example: PART #Support
PART #Lobby,#Support

*** MOTD Command ***

Displays the Message Of The Day.

Syntax: MOTD
MOTD *** RULES Command ***

Reads the ircd.rules file and sends the contents to the user.

Syntax: RULES
RULES *** LUSERS Command ***

Provides Local and Global user information (Such as Current and Maximum user count).

Syntax: LUSERS

*** MAP Command ***

Provides a "Network Map" of the IRC network. Mainly used for routing purposes.

Syntax: MAP

*** QUIT Command ***

Disconnects you from the IRC server. Those in the channels you occupy will be notified of
your departure. If you do not specify a reason, your nickname becomes the reason.

Syntax: QUIT Example: QUIT Leaving!

*** PING Command ***

The PING command is used to test the presence of an active client or
server at the other end of the connection. Servers send a PING
message at regular intervals if no other activity detected coming
from a connection. If a connection fails to respond to a PING
message within a set amount of time, that connection is closed. A
PING message MAY be sent even if the connection is active.
Note that this is different from a CTCP PING command..

Syntax: PING Example: PING irc.fyremoon.net
PING hAtbLaDe
PING hAtbLaDe irc2.dynam.ac

*** PONG Command ***

PONG message is a reply to ping message. If parameter is
given, this message will be forwarded to given target. The parameter is the name of the entity who has responded to PING message
and generated this message.

Syntax: PONG Example: PONG irc.fyremoon.net irc2.dynam.ac
(PONG message from irc.fyremoon.net to irc2.dynam.ac).

*** VERSION Command ***

Provides version information of the IRCd software in usage.

Syntax: VERSION
VERSION *** LINKS Command ***

Lists all of the servers currently linked to the network.

Syntax: LINKS

*** ADMIN Command ***

Provides Administrative information regarding the server.

Syntax: ADMIN *** USERHOST Command ***

Returns the userhost of the user in question. Usually used by scripts or bots to retrieve
userhost information.

Syntax: USERHOST Example: USERHOST hAtbLaDe

*** TOPIC Command ***

Sets/Changes the topic of the channel in question, or just display the current Topic.

Syntax: TOPIC TOPIC Example: TOPIC #operhelp
TOPIC #Lobby Welcome to #Lobby!!

*** INVITE Command ***

Sends a user an invitation to join a particular channel. You must be an Operator on the
channel in order to invite a user into it.

Syntax: INVITE Example: INVITE hAtbLaDe #Support

*** KICK Command ***

Removes a user from a channel. Can only be used by Operators or Half-Ops. If no reason is
specified, your nickname becomes the reason.

Syntax: KICK [,..] [,..] Example: KICK #Lobby foobar Language!
KICK #Lobby,#OperHelp Lamer23,Luser12 Lamers!

*** AWAY Command ***

Sets your online status to "Away".

Syntax: AWAY (Marks you as 'Away' with the reason given)
AWAY (Un-marks you as 'Away')
Example: AWAY Lunch time!

*** WATCH Command ***

Watch is a new notify-type system in UnrealIRCd which is both faster
and uses less network resources than any old-style notify
system. The server will send you a message when any nickname
in your watch list logs on or off.
The watch list DOES NOT REMAIN BETWEEN SESSIONS - you (or your
script or client) must add the nicknames to your watch list every
time you connect to an IRC server.

Syntax : WATCH +nick1 +nick2 +nick3 (Add nicknames)
WATCH -nick (Delete nicknames)
WATCH (View the watchlist)

*** HELPOP Command ***

HelpOp is a new system of getting IRC Server help. You type either
/HELPOP ? or /HELPOP ! The "?" in /HELPOP means query the help system and if you get no
response you can choose '!' to send it to the Help Operators online
Using neither ? nor ! will mean the command will be first queried
within the help system and if no match if found , it will be
forwarded to the help operators.

Example: HELPOP ?CHMODES (Channel Modes Help)
HELPOP ?UMODES (User Mode Help)


*** LIST Command ***

Provides a complete listing of all channels on the network. If a search string is
specified, it will only show those matching the search string.

Syntax: LIST Example: LIST
LIST *ircd*

New extended /LIST command options are supported. To use these
features, you will likely need to prefix the LIST command with
/QUOTE to avoid your client interpreting the command.

Usage: /QUOTE LIST options

If you don't include any options, the default is to send you the
entire unfiltered list of channels. Below are the options you can
use, and what channels LIST will return when you use them.
>number List channels with more than people.
people.
C>number List channels created between now and minutes ago.
C minutes ago.
T>number List channels whose topics are older than minutes
(Ie., they have not changed in the last minutes.
T minutes.
*mask* List channels that match *mask*
!*mask* List channels that do not match *mask*

NOTE : C & T parameters do not exist in Unreal 3.1.1-Darkshades.
LIST defaults to sending a list of channels with 2 or more members,
so use the >0 option to get the full channel listing.

*** PRIVMSG/NOTICE Command ***

PRIVMSG and NOTICE, which are used internally by the client for
/msg and /notice, in UnrealIRCd support two additional formats:
/msg @#channel will send the text to channel-ops on the
given channel only. /msg @+#channel will send the text
to both ops and voiced users on the channel. While some clients
may support these as-is, on others (such as ircII), it's necessary
to use /quote privmsg @#channel instead. You can also use
% to signify HalfOps on the channel.

Syntax: MSG ,,, : Example: PRIVMSG hAtbLaDe :Hello.
PRIVMSG hAtbLaDe,Hatter,GoodBot :Hello everyone!

The format for the NOTICE command is the same as above.

**** KNOCK Command ****

For channels which are invite only, you can "Knock" on the channel to request an invite.

The following criteria must be met :
- Channel is not +K (No knocks)
- Channel is not +I (No invites!)
- You're not banned!
- And you are not already there

Syntax: KNOCK Example: KNOCK #secret_chan I'm an op, let me in!

*** SETNAME Command ***

Allows users to change their 'Real name'
directly online at IRC without reconnecting

Syntax: SETNAME *** MODE Command ***

Sets a mode on a Channel.

Syntax: MODE Example: MODE #Support +tn
MODE #Support +ootn hAtbLaDe cb

### Channel Modes ###

p = Private channel
s = Secret channel
i = Invite-only allowed
m = Moderated channel, noone can speak except users with mode +voh
n = No messages from outside channel
t = Only channel operators may set the topic
r = Channel is registered
R = Requires a registered nickname to join the channel
c = No ANSI color can be sent to the channel (ColourBlock)
q = Channel owner
(*)Q = No kicks able in channel unless by U:Lines
O = IRCop only channel (Setable by IRCops)
A = Administrator only channel (Setable by Admins)
K = /Knock is not allowed
V = /Invite is not allowed
S = Strip all incoming colours away
l = Channel may hold at most of users
b = Bans the nick!user@host from the channel
k = Needs the channel key to join the channel
o = Gives operator status to the user
v = Gives voice to the user (May talk if chan is +m)
L = If +l is full, the next user will auto-join a = Gives protection to the user (No kick/drop)
e = Exception ban - If someone matches it
they can join even if a ban matches them
(**)h = Gives halfop status to the user
f [*]: = Flood protection, if the * is given a user will
be kick banned when they send in If * is not given they are just kicked
H = No +I users may join that channel. (Setable by Admins).
N = No nickname changes are permitted in the channel.
^ = Reports Channel modes in bitstring.
(Only exists in Development Versions i.e #define DEVELOP)
G = Makes the channel G Rated. Any words in badwords.channel.conf
are replaced with in channel messages.
u = "Auditorium". Makes /names and /who #channel only show @'s
C = No CTCPs allowed in the channel.
z = Only Clients on a Secure Connection (SSL) can join.

(*) Channel mode +Q
This is the 'peace' mode. Noone can kick each other
except by U:Lines. Bans can be placed though.

(**) Channel halfops (+h)
If you are marked as halfop (% in /names) you can do:
- Set topic
- Kick non-ops
- Set modes +vmntibe

*** CREDITS Command ***

This command will list the credits to all the people who helped create UnrealIRCd

Syntax: CREDITS
CREDITS *** LICENSE Command ***

This command shows the GNU License Which is hard-coded into the IRCd

Syntax: LICENSE
LICENSE *** TIME Command ***

Lists the current Server Date and Time.

Syntax: TIME
TIME *** SILENCE Command ***

Ignores messages from a user or list of users at the Server itself.

Syntax: SILENCE + (Adds a nickname to SILENCE list).
SILENCE - (Removes a nickname from the SILENCE list).
SILENCE (Lists the current SILENCE list)