Certification guide
XK0-005CompTIA Linux+: the honest guide
Linux+ (XK0-005) is CompTIA's exam for people who run Linux systems rather than people who have heard of them. You get a maximum of 90 questions in 90 minutes, a mix of multiple choice and performance-based items, and a pass mark of 720 on a scale of 100 to 900. The performance-based questions are the point: they present output, configuration, and terminal state, and they separate candidates who type commands from candidates who read about them.
This guide is written. There is no Linux+ question bank behind it.
Every fact below links to the page it came from. We have not written practice questions for this exam because the material it tests is sold rather than published, so there is no page we could cite for you to check our answers against. Until that changes, this page stays out of search rather than competing for readers we cannot serve.
How we decide what to write questions forThe blueprint is four domains: system management at 32%, troubleshooting at 28%, security at 21%, and scripting, containers, and automation at 19%. That last domain is what makes XK0-005 feel current. Git, container operations, and infrastructure as code sit on the exam because they sit in the job.
Who Linux+ is for
A good fit if
- You work helpdesk or Windows administration and want a credential that opens Linux server roles.
- You already touch Linux at work but your knowledge has holes shaped like whatever your environment never needed.
- You are heading toward DevOps or cloud work and want vendor-neutral proof of Linux fundamentals, since Linux underpins most cloud workloads.
- You want one exam that covers administration, security, and automation rather than three separate ones.
Probably not, if
- You have years of Linux administration behind you. Consider a distribution-specific hands-on exam like RHCSA instead; it is entirely performance-based and carries more weight for senior roles.
- You have never opened a terminal. Linux+ is an intermediate exam, and starting here means learning Linux and exam technique at the same time. Build basic command-line comfort first.
- You want a desktop or end-user credential. This exam is server administration: storage, services, firewalls, and troubleshooting under pressure.
Is Linux+ worth it?
For someone crossing from Windows administration or helpdesk into Linux roles, yes. Linux+ is a vendor-neutral credential that hiring filters recognise, and the studying itself builds exactly the skills the job interview will probe. At $369 with mostly free study material, the cost-to-signal ratio is good.
For someone aiming at DevOps or cloud, it is a solid foundation rather than a destination. The scripting, containers, and automation domain covers Git and container basics, which is the vocabulary those roles assume on day one. Pair it with Security+ or a cloud certification and the combination reads well.
For an experienced Linux admin, it is harder to justify. The exam will confirm what you know rather than stretch it, and a hands-on distribution exam signals more at that level. The honest test: read the XK0-005 objectives PDF, and if nothing on it makes you reach for a man page, your $369 belongs elsewhere.
What the exam actually asks you to do
Multiple choice, multiple response, and performance-based questions. The performance-based items drop you into a simulated console, network diagram, or configuration screen and score what you actually do.
Item formats
- Multiple choice
- Multiple response
- Performance-based
The highlighted formats are the ones you cannot answer from memory alone. CompTIA, Linux+ exam details ↗
Domain breakdown and official weightings
From the official CompTIA exam objectives. System Management is the heaviest domain at 32 percent, followed by Troubleshooting at 28 percent.
- System Management32%
- Security21%
- Scripting, Containers, and Automation19%
- Troubleshooting28%
Study plans by experience level
IT background, new to Linux
10 to 12 weeksat 6 to 8 hours
- 1Download the free XK0-005 objectives PDF from CompTIA and keep it open for the whole run. It is the syllabus and the checklist.
- 2Week 1: build the lab. VirtualBox plus one Debian-family and one Red Hat-family VM, both free. You need both because package management differs and the exam is distribution-neutral.
- 3Weeks 2 to 5: system management, the 32% domain. Files and permissions, storage and LVM, systemd services, networking tools, and software installation. Type every command you read about; do not move on from a topic until you have run it.
- 4Weeks 6 to 7: security. Users and groups, sudo, file permissions and access controls, SSH configuration, and firewalls. Lock yourself out of your own VM and recover; that is the domain in one exercise.
- 5Weeks 8 to 9: scripting, Git, and containers. Write small bash scripts that solve real problems in your lab, make commits in a Git repo, and run a few containers to learn the lifecycle.
- 6Weeks 10 to 12: troubleshooting, the 28% domain, by sabotage. Break a service, fill a disk, mangle permissions, then diagnose with systemd tools and logs. Run this site's free Linux+ questions until you clear the pass line consistently, then book.
Windows admin crossing over
6 to 8 weeksat 6 hours
- 1Read the objectives PDF and translate it. You already know what DNS, DHCP, services, and permissions are; you need the Linux expression of each. That framing cuts the workload roughly in half.
- 2Build the same two-VM lab and force yourself to stay in the terminal. The GUI habits that make you fast on Windows are the thing to unlearn here, because the exam presents everything as command output.
- 3Give extra weeks to the areas with no Windows equivalent: LVM storage, systemd unit files, package managers, and the permissions model. This is where crossover candidates lose marks.
- 4Do not skip the scripting and containers domain because it feels optional. It is 19% of the exam, and bash plus Git is learnable in two focused weeks.
- 5Finish with free practice questions here, review every miss against a man page or your VM, and book when your scores hold above the pass line.
Daily Linux user with blueprint gaps
3 to 4 weeksat 5 hours
- 1Go through the objectives PDF line by line and mark everything you have not personally done in the last year. Daily use builds deep ruts and wide blind spots; the marks are your syllabus.
- 2Drill the marked items in a VM. Common gaps for working users: LVM operations, firewall tools you do not run at work, the package manager of the other distribution family, and infrastructure as code concepts.
- 3Spend one session purely on troubleshooting method with systemd tools, since 28% of the exam is diagnosis and the score report will notice.
- 4Take a full set of practice questions cold. Whatever it exposes is real; fix it, retest, and book.
Common mistakes
- Studying without a terminal
- Reading about tar flags does not stick; using them does. The performance-based questions present real command output and terminal state, and no amount of video watching substitutes for the pattern recognition that comes from typing.
- Treating the scripting and containers domain as optional
- It is 19% of the exam, and candidates from traditional sysadmin backgrounds skip it because it feels like someone else's job. Bash, Git, and basic container operations are all testable and all learnable in a couple of weeks.
- Practising on one distribution only
- The exam is vendor-neutral, and package management is the trap. If your muscle memory is all apt, the dnf questions cost you marks, and the reverse holds. Run one VM from each family.
- Memorising commands without reading output
- The exam shows you what a command printed and asks what it means or what comes next. Knowing the syntax of a storage or networking tool without recognising its output is half the skill, and it is the half the exam weighs.
What comes after passing
Linux+ is valid for three years, renewed with 30 continuing education units plus CompTIA's continuing education fee, or by passing the current exam again at full price. Start logging CEUs the month you pass. A working admin generates them naturally through training, higher certifications, and documented work, and the people who pay to retake are usually the ones who never wrote anything down.
The natural next step depends on direction. Security+ pairs well because Linux hardening and identity work sit in both blueprints. A cloud certification pairs well because Linux underpins most cloud workloads, so the knowledge compounds rather than resets.
Spend the credential at work before you spend it on a job search. Volunteer for the Linux tickets, automate something manual with the bash and Git skills the exam forced you to build, and let the certification date on your CV coincide with actual output. That combination is what interviews reward.
Where people go next
Costs across the full renewal cycle are on the Linux+ cost page.
Frequently asked questions
What does the Linux+ XK0-005 exam cover?
Four domains: system management (32%), troubleshooting (28%), security (21%), and scripting, containers, and automation (19%). Expect heavy command-line content: systemd, permissions, LVM, networking tools, bash, Git, and container basics.
Is Linux+ respected?
It is a solid vendor-neutral credential for sysadmin and DevOps-adjacent roles. It pairs well with Security+ or cloud certifications, since Linux underpins most cloud workloads. Senior Linux roles tend to weigh hands-on distribution exams more heavily.
How should I practice for Linux+?
Run a Linux VM and type every command you study. Reading about tar flags does not stick; using them does. Our free questions include realistic CLI output so you learn to read the terminal, not just recognise terms.
How hard is Linux+?
It is an intermediate exam: a maximum of 90 questions in 90 minutes, multiple choice plus performance-based items, with a pass mark of 720 on a 100 to 900 scale. Difficulty tracks terminal experience almost exactly. Daily Linux users find it fair; readers without lab time find the performance-based questions brutal.
How much does Linux+ cost?
The voucher is $369. Study material runs from $0, using the free objectives PDF, a free VM, and this site's free questions, up to about $350 for paid courses and books. A retake costs the full $369 again, so the cheapest strategy is booking only when practice scores say you are ready.
Keep reading
- Linux+ practice questions
Free sample questions with the full explanation on every answer.
- Free Linux+ practice test
Ten real questions, playable now. No account, no card.
- Linux+ exam objectives
The full official blueprint, with practice pages on covered objectives.
- Linux+ passing score
The exact cut score, what kind of number it is, and the retake terms.
- How hard is Linux+?
An honest difficulty read from the format, the clock and the weights.
- What Linux+ costs
The voucher price, the retake, and what renewal costs across the cycle.
Cheat sheets
Printable reference tables, free.
Practise Linux+ for free while you decide
Original questions written from the published objectives, with the concept, the reasoning, and a note on every wrong option. No account needed to start.
Start free Linux+ questions