Book Image

The Software Developer's Guide to Linux

By : David Cohen, Christian Sturm
5 (2)
Book Image

The Software Developer's Guide to Linux

5 (2)
By: David Cohen, Christian Sturm

Overview of this book

Developers are always looking to raise their game to the next level, yet most are completely lost when it comes to the Linux command line. This book is the bridge that will take you to the next level in your software development career. Most of the skills in the book can be immediately put to work to make you a more efficient developer. It’s written specifically for software engineers, not Linux system administrators, so each chapter will equip you with just enough theory to understand what you’re doing before diving into practical commands that you can use in your day-to-day work as a software developer. As you work through the book, you’ll quickly absorb the basics of how Linux works while you get comfortable moving around the command line. Once you’ve got the core skills, you’ll see how to apply them in different contexts that you’ll come across as a software developer: building and working with Docker images, automating boring build tasks with shell scripts, and troubleshooting issues in production environments. By the end of the book, you’ll be able to use Linux and the command line comfortably and apply your newfound skills in your day-to-day work to save time, troubleshoot issues, and be the command-line wizard that your team turns to.
Table of Contents (20 chapters)
18
Other Books You May Enjoy
19
Index

Tunnels

SSH tunnelling is used to transport data over an SSH connection. In the following sections, we will look at two methods of tunnelling: local forwarding and proxying.

Local forwarding

SSH can create secure, encrypted tunnels to remote systems. This functionality is similar to what a VPN provides and can allow you to access services reachable from the remote system.

That’s powerful functionality, and with SSH, it’s actually simple to achieve. All you have to do is specify an additional argument, -L, with the destination and the local port to bind it to when establishing an SSH session.

Imagine a remote system running an HTTP server on port 8080. You want to access it on your laptop, on port 3000. Here is how to accomplish that with a simple command:

ssh -L 3000:localhost:8080 [email protected]

You can now open a browser and visit http://localhost:3000/ to access the web server as if you were opening that browser on the remote system and...