Execute the command apt-get purge telnetd to fully remove the package. To apply changes, you have to restart the service by running the command below: sudo /etc/init. Remove the telnetd package it is not needed. Find out and change the number in the line below: telnet 23/tcp To change the port (default is 23), edit the /etc/services file with your favorite text editor. And you can either run telnet serverip or use a Telnet client (PuTTy, SecureCRT, etc.) to access this server. The Telnet service is started automatically once the installation is done. If you really want to enable the Telnet in Ubuntu, just run the command below in text console (terminal) to install Telnet server: sudo apt-get install xinetd telnetd If possible avoid Telnet, and use Secure Shell (SSH) instead. Telnet is insecure because the communication is not encrypted, your password and all other data will be transmitted as clear text. It allows one computer to access a command-line interface on a remote host. Enable the telnet daemon service: - By default the service is disabled in /etc/xinetd.d/telnet, The disable.

Package telnet is for the client program in case one want to connect using telnet client from the instance, not needed for the exercise. TELNET (TELetype NETwork) is a network protocol used on the Internet or local area network LAN connections. Install telnet daemon in the instance: Install telnet-server using sudo yum install telnet-server. This is quick tutorial that shows you how to install and setup a Telnet server in Ubuntu 14.04 LTS.

Setup telnet server ubuntu