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Security isn't so important here, because the whole project is only for learning purposes. I am already happy if I can finish it just in time.

The server forwards the incoming messages, which are...

Unfortunately, I have to use rcp, but all R-services are TCP-based :-(

If multiple users sent files at the same time, the server would have to provide one socket for each incoming request, which...

Could I make use of xinetd as madiator server in this context?

The whole app shall be some kind of LAN messaging program with a central host that receives, stores and forwards messages to the correct receiver when he is online. For sending messages over the LAN,...

Thanks for your example :-)
There is still a problem, because I can't call "kill" on a remote machine. Hence, I can only call a remote script that sends the signal to the remote process. Is It...

I would like to implement a push service, but I havent't found any example for that on the internet yet. The step from "kill" command to push service is too large for me.

Do I have any better options in shell script than polling (while-sleep-construct)?

Maybe my approach isn't optimal, but my shell scripting knowledge is only a couple of days old. I thought it could work like this:

Dispatcher:
Writes text into a file. The file is sent to the...

This script can be much easier: Just a message should appear on the receiver's terminal. Depending on the user privileges, the message can be sent to only one or to all users. A simple chat is...

I'm not allowed to use any other language than Linux Shell Script. In my opinion, rcp or nc are the only commands that could be used for network messaging.

Thanks. Do you think that nc is a good candidate for writing a network messaging script?

Thanks. I also tried "talk", but the callee doesn't respond to the invitation.

Which commands could also be used to write some kind of simple network messaging script? Maybe netcat?

Hello,
I am using VirtualBox to simulate a small network with two Linux computers, the host is Mac OS X. My problem is that I can't send "write" and "wall" messages from the host to one of those...

I think I am going to simulate a network with VirtualBox, because here I have arbitrary amount of independent OSs.

The shell script should work like this:
1. The user logs in. Depending on his...

Thanks. Well, I thought of a primitive SMS-like messaging function that allows to send messages either to one user or to a group of users. I thought I could use nc for that task, but I don't know if...

Hello people,
which options do I have to send messages over a network from one station to another without using standard network messaging commands like write, talk und message? Thanks.