IRC commands allow you to perform specific functions on IRC, such as maintaining control of a channel and the users on it. The following list of Basic IRC commands should help you get started.

General Commands:

/JOIN #channel
Join the specified channel.

example: /join #Bangladesh

This will make you join the #Bangladesh channel. Once on a channel, anything you type will be seen by all the users on this channel. The #Bangladesh channel is very useful, so say hello and then ask any questions you want. If the channel you specified doesn't exist, a channel with that name will be created for you.

Some channels may also have keys ie. a password, which you need to specify when using the /join command.
example: /join #Bangladesh trout

This will make you join the #Bangladesh channel using "trout" as the password.

/PART #channel
Leave a channel.

example: /part #Bangladesh

/LIST [#channel] [-MIN #] [-MAX #]
Lists currently available channels. You can also tell mIRC to show only channels with a minimum and a maximum number of people. If you specify a #channel then mIRC will only list information for that channel. If you specify wildcards, eg. *love* then mIRC will list all channels that contain the word love in them.

example: /list
example: /list -min 5 -max 20
example: /list #mirc
example: /list *love*

/ME message
Tells the current channel or query about what you are doing.

/MSG nickname message
Send a private message to this user without opening a query window.

/QUERY nickname message
Open a query window to this user and send them a private message.

/WHOIS nickname
Shows information about someone.

/NICK nickname
Changes your nickname to a new nickname.

/QUIT [reason]
This will disconnect you from IRC and will give the optional message as the reason for your departure. (this message only appears to people who are on the same channels as you).

example: /quit Good Bye All!

/AWAY [away message]
Leave a message explaining that you are not currently paying attention to IRC. Whenever someone sends you a MSG or does a WHOIS on you, they automatically see whatever message you set. Using AWAY with no parameters marks you as no longer being away.

example: /away off to get something to eat, back in a moment!

/TOPIC #channel newtopic

Changes the topic for the channel.

example: /topic #friendly Oh what a beautiful day!

/INVITE nickname #channel
Invites another user to a channel.

Channel and User Commands
If you have Op status, the following commands give you control over both a channel and the users on it.

/KICK #channel nickname
Kicks named user off a given channel.

example: /kick #gb Ed

/MODE #channel|nickname [[+|-]modechars [parameters]]
This is a powerful command that gives channel operators control of a channel and the users on it.

Channel modes

User modes
 

Here a few examples of the MODE command:

To give someone Op status: /mode #channelname +o nickname

Giving someone Op status means giving them control over the channel and the users on it. Give this out sparingly and to people you trust.

To op several people: /mode #channelname +ooo nick1 nick2 nick3

To de-op someone: /mode #channelname -o nickname

To ban someone: /mode #channelname +b nickname (or user address)

example: /mode #animals +b Jiminy
example: /mode #tree +b joe@bloggs.edu

To Unban someone: /mode #channelname -b nickname (or user address)

example: /mode #gb -b Ed

To Make a channel invite only: /mode #channelname +i

You must now invite a user for them to be able to join your channel.

Nick register:

You cab quickly register a new nickname by following the commands stated belo and at the same time secure it fully. After connecting to DALnet, simply type following commands:

/NickServ info your nickname

See the result. If says that the nick isn't registered, then proceed to next commands

 /msg NickServ@services.dal.net register (your password) (your email address)

example: /msg NickServ@services.dal.net register Rupali-Guitar rg@hotmail.com

Then wait for 15 minutes and then check the email account which you've submitted during Nick Registration. There you'll find an authorization code something like the following,

/NickServ AUTH your nick  1990823096526608799980

Copy that line and paste in the mIRC status window and press enter. You'll see a notice saying that Mission accomplished ....blah blah. Your nick will be registered then. Follow the next instructions stated below then,

/NickServ access WIPE

/NickServ set enforce ON

/NickServ url your URL info

/nick set secure ON

Identify your nick:

/msg NickServ@services.dal.net IDENTIFY (your nick password)