CompTIA Linux+ Practice Test

The CompTIA Linux+ Practice Test is a free 20-minute skill test from Science of Apps. It tests readiness for CompTIA Linux+ — system management, services and user management, security, and automation, orchestration and troubleshooting — with command-line scenarios mapped to the published exam objectives. Score 70% or more on its 20 questions to earn a verifiable CompTIA Linux+ Exam Readiness certificate (SOA-CLP). Every question is based on published standards and research — including Linux man-pages (kernel.org), CompTIA Linux+ certification (CompTIA), The Linux command line for beginners (Ubuntu (Canonical)) — and each answer is explained with its source.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a CompTIA Linux+ Exam Readiness certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: Linux man-pages (kernel.org); CompTIA Linux+ certification (CompTIA); The Linux command line for beginners (Ubuntu (Canonical)); Docker: Get started (Docker Docs); Pro Git book (git-scm.com). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: System Management (Files, permissions and storage, Boot and kernel and Package management); Services and User Management (systemd services, Users and groups and Networking and scheduling); Security (Access control and SELinux, SSH and keys and Firewalls and hardening); Automation, Containers and Troubleshooting (Shell scripting, Containers and Git and Troubleshooting performance). Every question is an original scenario based on a published standard, official documentation or research, named under the question.

Linux system administrator, DevOps engineer, Cloud engineer, Support engineer and Junior SRE. It suits anyone who wants a quick, verifiable way to show CompTIA Linux+ skills, from students and career switchers to experienced professionals.

No. It is an independent practice test written to the publicly available CompTIA Linux+ content outline, for checking your readiness before you book the real exam. Science of Apps is not affiliated with CompTIA, and passing earns a Science of Apps certificate rather than the official credential.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Advanced: assumes years in the role or deep specialist knowledge. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.