Передать сообщение другому юзеру через консоль

[ @console @write @message ]

 

Можно разослать сообщение сразу всем юзерам на серверве:

sudo wall "Чичас сервер будет остановлен"

Можно написать через ssh

sh usernamex@192.168.10.20 wall "Мусоровоз у подъезда, время очистить trash:/ !"

И должна быть возможность написать определённому обладателю красных глаз

write username

но тут всё сложно.

Сперва надо зайти на машину с другим пользователем (сервер), и узнать, кто залогинен

who

Пример ответа на ноуте:

Это я, под моим юзером, по-умолчанию запущен в терминале №7, и я же под тем же юзером залогинен в терминале №2.

Пишем сообщение:

write astenix tty2

В ответ

write: effective gid does not match group of /dev/pts/3

Надо сперва узнать, разрешил ли юзер принимать сообщения:

mesg

Если ответ is n — надо разрешить

mesg y

echo "Связь есть, но сделано по-дурацки" | sudo tee tty2

echo "Связь есть, но сделано по-дурацки" | sudo tee /dev/pts/2

The write Command

The wall command sends a message to all the logged-in users. If we want to leave a message to a particular user, the write command is more suitable for this task. In addition, the command is installed by default on Linux machines.

For instance, if the user sidrah wants to send a message to a user mary, they’d execute the write command with the username mary:

$ write mary
Hey, mary!
Did you complete the assignment?
^D

Here, ^D means Ctrl + D. We press the combination to stop writing the message.

This initiates a chat session between the users and delivers the first messages to the user mary. Whatever user sidrah writes now appears in mary‘s terminal.

If user mary wishes to respond, they’d respond back by using the write command followed by a username:

$ write sidrah

Then, mary also types what they want to send to user sidrah in the terminal. To terminate the session, both users can press Ctrl + C.

Since the write command only delivers messages to the users currently logged in, user sidrah may want to check which user is currently logged in. For this, they can use the who command:

$ who
sidrah tty2 2023-01-07 09:07 (tty2)
mary tty3 2023-01-07 10:42 (tty3)

The output displays the currently logged-in users.

By default, the message option is enabled on Linux machines. To stop receiving unwanted messages from any local user, we’d use the mesg command with the n option:

$ mesg n

This blocks all incoming messages. To enable messaging again, we can use the y option:

$ mesg y

The y argument to mesg allows the current user to receive messages from other users.

4. The talk Command

If we want to interact with multiple local users in Linux, we can use the talk command.

By default, the talk command isn’t installed in Linux. To install it in Ubuntu or Debian, we’ll use the apt package manager:

$ sudo apt-get install talk
$ sudo apt-get install talkd

For CentOS or Fedora, we can use the yum package manager:

$ sudo yum install talk
$ sudo yum install talk-server

The talk command opens a new double-pane window for communication. The participants type messages in the top portion of the display and view the received messages at the bottom section.

Also, to respond to an incoming message, we can use the talk command followed by the username. Let’s look at an example.

For instance, if we want to talk to user mary on the ubuntu system, the command would look like this:

$ talk mary@ubuntu
Message from sidrah@ubuntu
talk: connection requested by mary@ubuntu
talk: respond with: talk mary@ubuntu

To this, the user mary would respond using the talk command along with the username:

$ talk sidrah@ubuntu

Let’s look at the exchange of messages:

----------------------------= YTalk version 3.3.0 =--------------------------
Are you ready for the meeting?
-------------------------------= mary@ubuntu =----------------------------
Yes, I'm ready!

On the other hand, the window panes will be reversed on the other user’s screen:

----------------------------= YTalk version 3.3.0 =--------------------------
Are you ready for the meeting?
-------------------------------= mary@ubuntu =----------------------------
Yes, I'm ready!

To terminate the chat window, the user presses Ctrl + C. This stops the chat session.

Или на сервере

В нулевом терминале — это мой юзер при запуске OMV, во втором — я залогинен по ssh.