Ubuntu

Hi, buddys.
I want to find a package to share the Session:
The main function is
1) on a ubuntu PC(1): <ssh -l username hostname>
2) share this session out with port(B). ( if this possible)
3) from other PC(2) use <telnet PC(1):port(B)>
4) PC(1) and PC(2) both can input and output!

IS any package can make this possible?

Well, what you want is very like "xterm -ls", which you might prefer, but it might be a security violation. You are going to a host with ssh, but want to let a telnet run your shell.

Really, the telnet creates a new session, with your listener, and you give it a shell to talk to, also often a security violation. You need a tcp listener to intercept the telnet connection. Usually, one spins off the service (ssh) for every connection on the listener.

A port is absolutely just a number, and TCP will only allow one listener to bind to it unless you use SO_REUSEADDR, which is a good idea just in case there is a non-listener still using the 'port'. Telnet is a client, the listener is a server and for you, the ssh is a service. You might want to devise some authentication for it, and shut down listening after the first connection so you do not show up on a port scan or netstat -a.

Do you want two screens/users? VNC X Windows is better for that.

First,,,Thanks very much...
actually, I do link the X window for Share, Because it isn't more efficiency.
If i need someone give me assistance, I think the CMD mode is more quickly...

The station i connected is more sensitivity, so i need to control the connection.. so i want some one assistance can only connect to my PC by SSH or Telnet...then do some operation under monitor.

anyway,,,thanks very much....