Linux - NewbieThis Linux forum is for members that are new to Linux.
Just starting out and have a question?
If it is not in the man pages or the how-to's this is the place!
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
to make an .sh script to run under linux.
It would listen to a port, and once a connection has been established, saved the messages to a file.
sorry for not clarifying my question.
No, that part was clear...you want to "make a script". What are you looking for US to tell YOU? How to write it? What to write it in? A shell script isn't what you'd want to do TCP/IP socket programming with as a rule. C/Perl/Ruby are better choices.
But since you don't say what OS or platform you want to use, what kind of data over what port to listen to, or give any details other than you want to "make a script", not sure what else to tell you.
You should Google for sample code. Wrox Publishing has a very good book about Linux programming, and they have a very simple client-server development code - they usually have sample code available for download.
You will certainly need some compiled program to act as the server, coded in C/C++ or something similar. I don't doubt that creating a server as a bash script is possible, but it's certainly an awful lot of work and full of ugly hacks, just to do something that is quite easy to do in C/C++.
You can always take a look at netcat, and do something like
Code:
#!/bin/bash
while true ; do
netcat -l -p 5555 >> stuff.log
done
Connect to port 5555 (with netcat or telnet or whatever) and write some stuff and it will end up in stuff.log. The loop is necessary since netcat will exit once the client disconnects. This will also only allow one connection at any time, so it's kind of limited...
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.