Putty linux serial port connection

How can I access putty from linux terminal?

I’m trying to configure my cisco 2950 switch and I need to use putty on linux. Im not used to using linux but I’ve been told that putty is built in to linux terminal. I have my serial console cable connected to the router but I’m unable to telnet in. How do I use putty?

2 Answers 2

The PuTTY program is not built into Linux. What the other person meant is that most Linux systems come with commands that provide the same functionality as PuTTY:

• The SSH client is ssh .
• The Telnet client is telnet .
• The serial console clients are screen and minicom .

To connect to the first serial port using screen, run:

Press Ctrl A followed by Ctrl K to disconnect. (Some systems use just K instead of Ctrl K .)

@Kruug: That’s not always desirable when using screen as a serial console terminal, since it leaves the tty device busy and can cause confusion.

Putty does exist on Linux too ( sudo apt-get install putty on most debian-ish systems), if Putty is exactly what you have a guide for — even though it’s unnecessary on Linux.

To find the serial port to use for Putty/Minicom/Screen, you could plug in the cable and shortly after use dmesg | grep USB in a terminal to see the output (you should see something like New device on /dev/ttyUSB0 or various /dev/tty* ‘s to make sure you are attempting to connect to the correct Serial line.

As an alternative if Linux overwhelms you:

If all you need is access to the Serial connection and nothing specific from the Linux shell, then you can use Putty from Windows (I would assume you have access to a Windows machine as well). (Download Page).

Determine which Serial port (or «COM» port in windows) you need in Device Manager:

Then in Putty, choose Serial , enter the COM port and the BAUD (Speed):

If you need advanced settings to the serial connection in PUTTY, you can do that in the left menu Connection > Serial

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Использование PuTTY

PuTTY — это бесплатный Telnet и SSH-клиент с помощью которого можно подключаться к контроллеру по SSH или через Debug-консоль, а также настраивать serial-устройства по протоколу Telnet.

Перед использованием PuTTY, программу нужно установить:

• Для ОС Windows — загрузите и установите дистрибутив с официального сайта программы.
• Для Debian-подобной ОС Linux — выполните в консоли команды:

sudo apt update sudo apt install putty

Подключение по SSH

Значение логина и пароля по умолчанию смотрите в статье SSH. . Для примера рассмотрим подключение по SSH к контроллеру Wiren Board:

1. Запустите PuTTY.
2. Выберите слева в поле Category ветку Session.
3. Ведите IP-адрес контроллера. Как узнать IP-адрес контроллера
4. Укажите номер порта — 22.
5. Переключатель Connection type установите в положение SSH.
6. Нажмите кнопку Open.
7. При первом подключении к контроллеру появится окно запроса на приём от него ключа шифрования соединение — нажмите Accept.
8. При успешном подключении откроется окно терминала с предложением ввести логин:
   • login as: введите логин и нажмите клавишу Enter .
   • password: введите пароль пользователя. Введённые символы не отображаются, после окончания ввода нажмите клавишу Enter .
9. Если логин и пароль введены верно — в консоли появится приветственное сообщение и приглашение на ввод команды.

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Putty linux serial port connection

1. Install putty
2. Enter putty on the command line
3. Change 3 places, the first connection type selects Serial, the second Serial line selects the USB interface on the computer, and the third Speed ​​selects 115200 (may change)

Linux check USB interface
ls /dev/ttyUSB*
Add permissions to the USB interface
sudo chmod 777 /dev/ttyUSB0

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