Linux Foundation certification practice
Practise Linux Foundation Certified System Administrator LFCS across all 6 official exam domains — User and Group Management, Operation of Running Systems, Essential Commands, Networking, and more — with original exam-style questions, full explanations, and wrong-answer analysis. Courseiva helps you prepare with realistic practice questions, topic-based revision, explained answers and structured study routes.
Ways to study LFCS
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
New here? Start with this
Start with a 25-question practice test
Covers all 6 domains · takes ~5 min · no account needed · shows your weak areas immediately
Key facts for the Linux Foundation Certified System Administrator LFCS exam.
Exam cost
$395 USD / ~£315
Duration
120 minutes
Question count
Performance-based tasks (typically 15–25 tasks)
Passing score
74%
Validity
3 years
Delivered by
Linux Foundation (PSI Online)
Online proctored
Yes — available
Retake policy
One free retake included; must wait 24 hours before retaking
Question formats
The Linux Foundation Certified System Administrator (LFCS) is a performance-based certification that proves competency in essential Linux system administration tasks. Candidates are tested live on a real command-line environment across areas including storage management, networking, user and group administration, service configuration, and security. Unlike multiple-choice exams, the LFCS requires candidates to solve practical tasks, making it a strong signal of real-world ability. It is valid for three years and is recognised by employers seeking proven Linux operators.
Official prerequisite
None — no formal prerequisites
Recommended experience
1+ year of Linux command-line experience; comfort with a text editor (vim or nano); basic understanding of networking and filesystems
IT professionals who administer Linux servers in production or lab environments and want a vendor-neutral credential to prove it
Should you skip this exam?
Complete beginners to Linux — build foundational CLI skills first (e.g. LPI Linux Essentials or CompTIA Linux+) before attempting this exam
Courseiva study tip
Practice entirely in the terminal. Set up a local VM running Ubuntu or CentOS/RHEL and work through real tasks: mount filesystems, configure systemd services, set up networking with nmcli/ip, manage LVM, and configure firewalld/iptables. Time management during the exam is critical.
UK salary range
£40,000 – £65,000
US salary range
$75,000 – $115,000
Job roles that cite LFCS
What certification to take next
The LFCS costs $395 USD, which includes one free retake. The Linux Foundation frequently offers discount codes (20–40% off) during promotions.
The passing score is 74%. Scores are calculated based on the percentage of tasks completed correctly within the live exam environment.
The LFCS is entirely performance-based — there are no multiple-choice questions. You are given a live Linux terminal and must complete a set of real administration tasks within 120 minutes.
It is moderately difficult. The performance-based format demands genuine command-line proficiency rather than memorised answers. Candidates with consistent hands-on Linux experience generally pass; those who only study theory often struggle with task completion speed.
The LFCS covers essential operations (filesystem navigation, file permissions), user and group management, networking configuration, storage management (partitions, LVM, filesystems), service management with systemd, package management, and basic security (firewall rules, SSH configuration).
The LFCS is valid for 3 years. Recertification requires passing the current version of the exam before the credential expires.
System administrators, DevOps engineers, and cloud operations engineers who work daily with Linux servers and want an internationally recognised credential that proves practical competency.
See how LFCS stacks up against related certifications.
100% free — no account required
Everything on Courseiva for LFCS is free — no subscription, no trial, no email wall. Pick a mode that matches your study phase: practice questions early on, mock exams closer to your exam date.
Practice Test
A focused 20-question round with worked explanations for every answer.
Mock Exam
A timed, full-length session that mirrors the real exam format.
Quick 25
A short 25-question set for a fast daily check-in.
Domain Practice
Focus exclusively on one exam domain to target your weakest area.
50-Question Set
A 50-question round spanning every exam domain.
Cheat sheet
The key facts and numbers for this exam on one page.
Acronyms
Every acronym on the exam blueprint, defined plainly.
Official objectives
Every official objective mapped to a matching practice page.
Exam glossary
A full glossary of LFCS exam terminology.
Practice by topic
A dedicated practice page for every exam topic.
Courseiva Exam Intelligence
Data confidence: BuildingDerived from Courseiva's continuously updated practice dataset: 507 exam-style questions. Updated 2 July 2026.
Question difficulty mix
Average time per question: 94s
6
Exam domains
official blueprint domains covered by the bank
507
Questions
exam-style questions in the LFCS bank
Exam guide
Start with a short practice session, review each missed answer, then return to the topics that caused mistakes.
Linux Foundation Certified System Administrator LFCS spans 6 official exam domains (User and Group Management, Operation of Running Systems, Essential Commands, and more). Questions test whether you can apply each objective in a realistic scenario, not just recall a definition.
Related practice questions
Use these internal links to move from the exam guide into focused topic practice pages.
Practise LFCS questions linked to User and Group Management.
Sharpen your LFCS knowledge of Operation of Running Systems.
Targeted LFCS practice covering Essential Commands.
Practise LFCS questions linked to Networking.
Targeted LFCS practice covering Service Configuration.
Targeted LFCS practice covering Storage Management.
Work through LFCS questions on LFCS fundamentals.
Practise LFCS questions linked to LFCS scenario.
Work through LFCS questions on LFCS troubleshooting.
Practice directory
Every practice set is a unique selection of questions — numbered tests, domain-focused sessions, and topic-specific quizzes.
Showing 8 of 37 tests. See all 37 LFCS practice tests →
Official blueprint
Target weak areas by practising questions from a single domain. Each domain page shows all questions, difficulty breakdown, and a focused practice session.
Covers 10% of the LFCS exam →
13% of LFCS questions come from this domain →
Weighted 20% on the official LFCS blueprint →
Covers 25% of the LFCS exam →
Weighted 12% on the official LFCS blueprint →
Covers 20% of the LFCS exam →
Deep-dive questions
The most-searched LFCS questions — each with a detailed explanation, worked example, and full answer breakdown.
Learn the concepts
16 book-style chapters cover every LFCS objective in plain English. Read the theory here, then test it with practice questions.
Chapter 1
Linux Filesystem Hierarchy and Navigation
12 min read
Chapter 2
File and Directory Management Commands
12 min read
Chapter 3
File Permissions and Ownership
12 min read
Chapter 4
Text Processing and Filtering Tools
12 min read
Chapter 5
Process Management and Monitoring
12 min read
Chapter 7
User Account and Group Management
12 min read
Chapter 8
Password Policies and User Privileges
12 min read
Chapter 9
Disk Partitioning and Filesystem Creation
12 min read
Free study guide
The Courseiva LFCS study guide covers exam format, the official domain blueprint with weights, a structured study plan, and domain-specific tips for each section. Use it alongside practice questions to build both conceptual depth and exam confidence.
Sample questions
Original exam-style questions — not copied from any exam or dump site. Open a question for the full answer breakdown.
A systems administrator is troubleshooting a server that runs a database application. The server has 64 GB of RAM and 16 CPU cores. The administrator notices that the system is usi…
Refer to the exhibit. An administrator attempts to mount all filesystems using mount -a, but it fails. The error message indicates that UUID=jkl012 is not found. Which of the follo…
A Linux administrator wants to restrict user 'alice' to only be able to use the system for non-interactive tasks (e.g., running cron jobs and receiving mail) but not allow her to l…
Refer to the exhibit. What is the most likely issue with the Apache web server?
An administrator needs to grant a user named 'john' the ability to switch to any other user without a password. Which TWO of the following steps are required to achieve this?
A team of developers must share files under /opt/project. All developers are members of the 'devteam' group. New files must be automatically assigned to group 'devteam' and be writ…
Courseiva provides free Linux Foundation Certified System Administrator LFCS (LFCS) practice questions with original exam-style questions, detailed explanations, topic-based practice, mock exams, readiness tracking, and study analytics. Courseiva is an independent platform and is not affiliated with Linux Foundation.