Practical Linux Security Cookbook - Second Edition

How to do it...

In this section, we will see how to create a patch for a program, using the diff command, and then apply the patch using the patch command:

1. Our first step will be to create a simple C program called example.c to print This is an example, as follows:

2. Now, we will create a copy of example.c and name it example_new.c
3. Next, we will edit the new file example_new.c and add a few extra lines of code in it, as follows:

4. Now, example_new.c can be considered as the updated version of example.c

5. We will now create a patch file and ...