LFCS
The LFCS is the Linux Foundation's hands-on credential for working Linux system administrators — and unlike a multiple-choice test, it drops you into a real terminal and grades the system you actually configure. There is no guessing your way through: a service either starts, a mount either holds, a user either has the right permissions. With recruiters and DevOps teams treating LFCS as proof you can run production Linux, a missed attempt can stall a job offer or a promotion. This page breaks down exactly what's tested, how the exam is delivered and proctored, and how to get it passed the first time.
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No upfront fee — you settle only after your verified passing result. We advertise guaranteed results — 100% pass guaranteed or money back.
How the LFCS is built — at a glance
~17–20
No multiple choice. You complete real system-administration tasks in a live Linux shell and are graded on the resulting state of the machine, not on the commands you typed.
120
One continuous 2-hour block. There's no separate break clock, so you budget your own time across tasks and decide which to tackle first.
67%
A single cut score of 67%. Partial credit is awarded on multi-step tasks, so a configuration that's half-complete still earns part of its points.
The LFCS no longer asks you to pick a distro up front. Tasks are designed to be solved on either a Debian-family (APT) or a RHEL-family (DNF) system, so you should be comfortable with both package managers and the common service-management patterns across them.
After the exam, the grading system inspects the actual state of your system — whether a service is enabled and running, a filesystem is mounted persistently, a user has the right group membership. You can solve a task in any valid way; only the working outcome counts toward your 67%.
Five domains — bars show each domain's official weight on the exam
Installing and configuring software, managing services with systemd, scheduling jobs, boot targets, kernel modules, and keeping the system running predictably under change.
Configuring interfaces and routing, name resolution, firewall rules, and basic services — plus diagnosing connectivity issues from the command line.
Partitioning, filesystems, mounting (including persistent mounts in fstab), LVM, swap, and managing disk space and quotas.
File and directory operations, text processing with grep/sed/awk, archiving, permissions and ownership, and confident navigation of the shell.
Creating and managing users and groups, password and account policies, sudo configuration, and access control — the smallest domain by weight, but a common source of quick, reliable points.
Operations Deployment and Networking together account for half the exam, so they're where most candidates win or lose. But the weighting also means the easier-to-secure domains — Essential Commands and Users and Groups — can carry you over the 67% line if you bank them cleanly and don't burn time on a single stubborn task.
The LFCS is online-only — here's exactly what test day looks like
There's no test-center option — the LFCS is delivered entirely online. You launch the exam inside the PSI Secure Browser, which connects you to a remote Linux desktop with a ReadMe tab and a Remote Desktop tab. Your tasks are completed in a terminal you reach from the desktop's Applications menu or its on-screen icon.
A live proctor monitors your camera, microphone, and screen for the full two hours through PSI Bridge. You complete a system check, identity verification, and a webcam scan of your room beforehand. You may consult the permitted in-exam documentation, but you cannot open the internet, extra browser tabs, or personal notes.
A valid, unexpired government photo ID whose name matches your Linux Foundation profile. The proctor verifies it before the exam unlocks.
A clear desk, a quiet private room, no second monitor, no phone within reach, and a full webcam scan of your surroundings before the timer starts.
Stay on camera and in frame the whole time. No other applications or browser windows, no talking aloud, and no leaving your seat — any of these can flag the session.
The LFCS validates hands-on Linux administration skill
No formal requirements — but it rewards real practice
Difficulty: The LFCS is challenging precisely because there's nowhere to hide — you either make the system work or you don't, all under a 2-hour clock. Most candidates need solid, repeated lab practice before they're reliably above 67%. That time pressure and the all-or-nothing feel of performance tasks are exactly the pain points our help is built to remove.
The LFCS is a high-pressure, hands-on test where a few stubborn tasks can sink an otherwise strong attempt. Exam Assist pairs you with a vetted Linux specialist and works on a pay-after-you-pass model — so the risk sits with us, not you. No upfront fee, guaranteed results: Exam Assist handles the sitting end to end, and you settle only after the verified result.
Tell us your target date, your current comfort level with each domain, and your scheduling window. Takes a couple of minutes over WhatsApp, Telegram, or Discord.
We review your timeline and the LFCS domains and tell you plainly whether it's realistic — before any money is discussed. If it isn't a fit, we say so.
Exam Assist handles the sitting end to end. You're matched with a Linux specialist who maps the work around the five domains, the performance-based format, and the PSI Bridge environment — discreetly and confidentially.
You only pay once your passing result is confirmed in your candidate portal. No verified result, nothing owed.
Tell us about your exam and get an honest, no-pressure feasibility answer first.
Straight answers about the LFCS exam
Get started and compare sibling Linux certifications
Pair with a vetted Linux specialist on a results-first arrangement. No upfront fee — settle only after a verified passing result.
Start here LFCEThe Linux Foundation's next-level engineering credential — the natural step up from LFCS for advanced administrators.
View exam RHCSARed Hat's performance-based EX200 — the RHEL-focused counterpart to LFCS, also entirely hands-on.
View exam Linux+A vendor-neutral Linux certification with a mix of question types — a popular alternative entry point alongside the LFCS.
View examGet expert LFCS help with no upfront fee — you settle only after your verified passing result. Honest feasibility answer first, results-first arrangement always.