Welcome to lesson 22.
This lesson is all about troubleshooting.
I'll start by showing you how to use the different troubleshooting modes.
And next you'll learn how to reset the root password if you've lost access to the root
account.
You'll discover how to use the early boot debug shell, and after that we'll explore
common issues related to problems on the file system, network performance problems, as well
as memory shortage.
You'll learn how to use the SOS report utility, and we'll also have a look at some common
Red Hat websites that can be helpful in troubleshooting, and at the end of this lesson you'll find
a lab as well as the lab solution.