A Familiar Course
This course felt more like a refresher than something completely new.
A lot of the topics were already familiar to me, especially Linux, command-line tools, file navigation, permissions, and basic system tasks. I had already practiced many of these commands before, so I moved through the course faster than the previous ones.
Still, revisiting them was useful. It helped reinforce the basics and reminded me of commands I do not always use regularly.
Hands-On Practice
One thing I liked about this course was how practical it was.
Every module included lab activities where I could use the commands directly through Google’s lab environment. Instead of only reading about Linux commands, I practiced navigating directories, working with files, checking and changing permissions, managing users and groups, and completing small security-related tasks.
The repetition made the course feel more like practice than theory.
Linux and SQL
The Linux sections were the most familiar to me since I already had experience using the command line.
SQL was also a refresher. The activities focused on searching and filtering information from databases, which helped reinforce how SQL can be useful when working with security-related data.
I would not say these topics were completely new to me, but going through them again helped strengthen what I already knew.
Reflection
This was probably one of the shortest courses for me because I already had experience with most of the tools being introduced.
Even so, I still found value in it as a checkpoint in my learning journey. It gave me a chance to revisit the fundamentals, practice the commands again, and make sure I could still use them comfortably.
For me, Course 4 was less about learning something new and more about reinforcing existing skills through hands-on practice.