Operating Systems: Overview, Administration, and Security
IBM · View on Coursera ↗
Taught by IBM Skills Network Team
Information TechnologyComputer Science
About the course
51% of organizations are planning to increase security investments as a result of a breach (IBM Report). Companies need skilled IT support and cybersecurity professionals now more than ever. Whether you’re just starting out or switching to tech, this course provides the critical operating systems (OS) knowledge you need to move forward. Operating systems are fundamental to all aspects of computing. In this course, you’ll learn foundational concepts common to all operating systems and the uni
The dissent
The most-upvoted critical review (44 votes, 1.0★).
“Very little actual knowledge, first half of this course is basically a repetition of the Introduction into Cybersecurity course. The quality of a good amount of the slides is so poor, that they cannot be decrypted even in the best video quality option. Also the sound quality is sometimes so bad, that you have to read the text under the video, which in itself is also sometimes very far from what was actually said in the video (automatic subtitling / translations?) Some questions in the quizzes are very difficult to guess, especially when the questions are too vague. Other questions are simply grammatically wrong. There is also no substantial mentoring of any kind. If I were you, reading this, don't pay money for this course, at best, audit it for free and move on.”
Coursera's 4.6 comes from 5,734 ratings. Of those, 2.6% are 1–2★.
Starisk reads the reviews learners voted most helpful, and weights each by the square root of its votes: a review with 80 upvotes counts about five times one with 2. Unvoted reviews are not skipped out of laziness — by this model they carry no evidence that other students endorsed them.
That measures what the most-endorsed reviews say, not “true quality.” The rating distribution above is the whole population, so you can see the sample next to it.
Reviews read on 23 Oct 2026.Read them on Coursera ↗