Question

I have a server that accept telnet connections for management. I miss the command history so I want to make my telnet session support it. My questions:

1) Do I have to implement that on the server side, so the server will send the past commands to the client and then the client can re-execute?

2) Is there anyway to implement this functionality in the telnet client (not messing with the server) ?

If answer is 1) then I need to know how to capture and send the up and down arrow keys on my telnet session without having to press enter.

Answer 1

This isn’t a server issue. Just use rlwrap with your telnet client. It gives you readline with no programming.

$ rlwrap telnet server port

(I actually use nc instead of telnet since it is easier to use and is more robust.)