I can use telnet to connect to a telnet server simply by typing: 'telnet localhost', whereas localhost can be replaced with any desired IP-Address.
But now I want to do something different and I have this question: Is there any way to open a telnet server (simply a TCP server) in Ubuntu, which simply shows the connected clients and prints out to console every received bytes as ASCII?
Are you capable/willing to code? This task is one of the examples explained in the Camel Book, "Programming Perl", published by O'Reilly.