LFCS · Linux Foundation Certified System Administrator
LFCS practice labs, graded on the real machine
Practise the LFCS exam domains hands-on: every lab drops you into a live Linux terminal and grades what the machine actually looks like when you're done, not a typed answer. Finish with a timed mock exam.
15 labs · 4 free · 15 on Ubuntu 22.04
LFCS Mock Exam I
Twenty state-graded tasks under the clock — no hints, no feedback until you submit. Weighted like the current LFCS: operations, networking, storage, essential commands, and users and groups, graded on what the machine says.
120 minutes · 20 tasks · pass at 66%
Labs by exam domain
Operations Deployment
25% of the exam · 4 labsNetworking
25% of the exam · 3 labsStorage
20% of the exam · 4 labsEssential Commands
20% of the exam · 5 labs- Git: Fix on a Branch, Merge, and Keep the Tree CleanfreeEasy
- Git: Undo a Pushed Commit Without Rewriting HistoryMedium
- Load Balancer: nginx in Front of Two App Servers and a StandbyfreeMedium
- Storage Performance: Find the Disk Hog with iostat and Throttle ItMedium
- TLS: Get a Certificate Signed by the Internal CAfreeMedium
Users and Groups
10% of the exam · 2 labsSignal9 is independent and not affiliated with or endorsed by the Linux Foundation. LFCS is a trademark of the Linux Foundation.