Practical Linux Security Cookbook - Second Edition

How to do it...

Now, we will see how to use chmod in different ways to set different permissions:

1. We first check the current permission of the file and when it was created:

As we can see, currently only the user/owner has read and write permission, whereas groups and other users have only read permission.

2. Now, let's change a single permission for the owner by using the + symbol, which is for adding permission:

chmod u+x file1.txt

This command will add the execute permission for the owner of the file.

3. To add multiple permissions, we can ...