Sudo apt-get install telnetd

With this command, we can install a telnet server :. This is a valid question BTW. Do not install the telnet server, ever. Also the telnet client is not included by default in many distros. For instance it is very common in docker-land to face the need of installing several tools that are taken otherwise for granted. For example, Official OS docker images most likely will be shipped with a shell and its built-ins.

Telnet will not be shipped in any of those. You may need to install them explicitly. You shouldn't need to install any packages; a telnet client should come standard with Ubuntu. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Learn more. How to install a telnet client? Ask Question. Asked 5 years, 6 months ago. Active 5 months ago. Viewed k times.

With this command, we can install a telnet server : sudo apt-get install xinetd telnetd But can a telnet client be installed without a telnet server? A telnet server can be dangerous. Telnet is a client server protocol where clients uses telnet tool which to connect remote telnet server. This telnet server may be switch, router, windows operating system, linux server or a printer. In this tutorial we will look how to install and enable telnet with some usage examples.

We can install telnet package with the following command in deb based Linux distributions. As windows operating system do not have online package manager telnet is provided by inline. By defualt telnet server and client applications are not enabled. We will enable the client where server can be enabled too.

Follow these instructions. As telnet is old fashion protocol it provides some defects. One of the most important negative issue with telnet is its security features. A Telnet client is a useful tool for testing your mail or web server, for example, as shown below. By default, the Telnet server package is available in the Ubuntu You can install it by just running the following command:.

Once the installation is completed, you can check the status of Telnet service using the following command:. Telnet server is now installed and listening on port It's time to connect the Telnet server from the remote system. You will be asked to enter your username and password. After successful authentication, you should see the following output:. The Telnet command is also very useful to test a mail server. Connect to a mail server using Telnet. Now you can respond to the server with the ehlo command, followed by your sender domain name.

This test procedure is useful if you like to find out if mail services port 25 are blocked by your internet service provider or data center. The port you use is up to you. Every server by defenition has a port, http will be 80 and https will be If you use vnc or rdp the port will be by defenition diferent.