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This article will explain in detail how to communicate with other users on the Linux command line. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Wall

The wall command (which means write all) allows you to send information to all users who are logged in to the system. Any user can use the wall command, but the wall command is usually used by the system administrator to send notification notifications to the user (for example, the server will shut down maintenance).

A system administrator may send the following message:

$wall The system will be going down in 15 minutes to address a serious problem

Then, all logged-in users can see notifications like this:

Broadcast message from admin@dragonfly (pts/0) (Thu Mar 5 08:56:42 2020): The system is going down in 15 minutes to address a serious problem

If you want to send a message with single quotation marks, you need to enclose the message to be sent in double quotation marks, as shown below:

$wall "Don't forget to save your work before logging off"

In the command shown in the above example, the outermost quotation marks are not displayed when the message is transmitted, but if there is no outermost quotation mark, the command will wait for a quotation mark paired with the single quotation mark in the sentence to end the sentence.

Mesg

If for some reason you want to reject a message from a user, you can use the mesg command. This command should be used with the parameter n or y, which means to reject or accept a letter from a user, respectively. The use case is as follows (alvin is the user name):

$mesg n alvin$ mesg y alvin

It is worth noting that after blocking users with the mesg command, the blocked users will not be notified that they have been blocked, that is, the blocked users will not know that they have been blocked.

You can also use this command to accept or block communications from all users by omitting the user name parameter:

$mesg y $mesg nwrite

Another command that can send text messages directly without having to convert them to email is write. This command can be used to communicate with a specific user. For example, if you want to send a message to a user whose user name is alvin, you can use the following command:

$write alvinAre you still at your desk?I need to talk with you right away.C

Press ctrl+C to exit after writing the sending message. This command allows you to send messages, but instead of opening a duplex channel, it can only be used to send messages. If the receiving user logs in on more than one terminal, you can select a terminal you want to transmit or rely on the system to select a terminal transmission that takes the least time, as follows:

$write alvin#1

If you are blocked by the user alvin, you will see the following prompt:

$write alvinwrite: alvin has messages disabledtalk / ytalk

The talk and ytalk commands allow you to establish interactive communication with one or more users, where the talk command allows you to establish interactive communication with only one user. Both the talk and ytalk commands launch a dual-layout window, and each party of the communication can enter information in the upper section of the window and see the response message in the lower section.

The party requested to join the communication can respond to the communication by entering talk and followed by the user name of the initiator of the communication, as follows:

Message from Talk_Daemon@dragonfly at 10:10... talk: connection requested by alvin@127.0.0.1.talk: respond with: talk alvin@127.0.0.1$ talk alvin

It is worth noting that when the system has both talk and ytalk installed, the talk command is associated with the ytalk command by default, so when you type talk alvin, the system actually executes ytalk alvin. Since both commands are installed on my system, the output I see after executing the above command is actually ytalk alvin:

-- = YTalk version 3.3.0 =-- Is the report ready?--= root@lxlinux =- -Just finished it

The above is the window information seen by the user alvin, while the window content seen by the root on the other side of the communication is the reverse:

-- = YTalk version 3.3.0 =-- Just finished it--= alvin@lxlinux =- -Is the report ready?

Similarly, this command is terminated with ctrl+C.

To use this command to communicate with users of other systems, you need to add a parameter of-h, the parameter value, host name, or IP address. The use cases are as follows:

$talk-h 192.168.0.11 alvin on "how to communicate with other users in the Linux command line" this article is shared here, I hope the above content can be helpful to you, so that you can learn more knowledge, if you think the article is good, please share it for more people to see.

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