Reinforce XK0-006 concepts with active-recall study cards covering all 5 blueprint domains. Each card shows the question on the front and the correct answer with a full explanation on the back.
Flashcards work through active recall — the process of retrieving information from memory rather than passively re-reading it. Research consistently shows that active recall produces stronger, longer-lasting memory than re-reading study guides. For XK0-006 preparation, this means flashcards are one of the highest-return study tools available.
Attempt recall first
Read the XK0-006 question on each card, pause, and attempt to formulate the answer in your own words before revealing. This retrieval attempt — even if wrong — dramatically strengthens memory compared to immediately reading the answer.
Review wrong cards again
When you get a card wrong, note it and add it back to your review pile. Spaced repetition — seeing difficult cards more frequently — is the mechanism that makes flashcard study far more efficient than linear reading.
Study by domain
Group your XK0-006 flashcard sessions by domain for the first 3–4 weeks. Master one domain before moving to the next. In the final week, shuffle all cards together to test cross-domain recall — which is what the real XK0-006 exam requires.
Short sessions beat marathon reviews
20–30 flashcard cards per session, done daily, produces better retention than a single 200-card marathon session. Five short daily sessions per week over 4 weeks gives you over 400 total card reviews — enough to reliably pass XK0-006.
Sample cards from the XK0-006 flashcard bank. Read the question, think of the answer, then read the explanation below.
A Linux administrator needs to add a new user named 'jdoe' with a home directory and a bash shell. Which command accomplishes this?
useradd -m -s /bin/bash jdoe
The useradd command with -m creates the home directory and -s sets the shell. useradd -m -s /bin/bash jdoe is correct.
A security audit reveals that users can change their password without meeting complexity requirements. Which PAM module should be configured to enforce password complexity?
pam_pwquality
pam_pwquality is the module that enforces password quality rules like length, character classes, etc.
An administrator wants to allow the user 'ops' to run only the command '/usr/bin/systemctl restart httpd' via sudo on a specific host 'webserver'. Which /etc/sudoers entry is correct?
ops webserver=(root) /usr/bin/systemctl restart httpd
The format is: username hostname=(runas) command. For host-specific, use the hostname. The correct entry is 'ops webserver=(root) /usr/bin/systemctl restart httpd'.
A Linux administrator needs to check which services are listening on TCP ports on a server. Which command should be used to replace the deprecated netstat command?
ss -tlnp
The ss command is the modern replacement for netstat, and ss -tlnp shows listening TCP ports with process information.
A Linux engineer is investigating high disk I/O on a server. Which command provides disk I/O statistics including %util, await, r/s, and w/s?
iostat -x 1
iostat reports CPU and disk I/O statistics, with columns like %util, await, r/s, and w/s.
During boot, a Linux system displays a kernel panic with 'VFS: Unable to mount root fs on unknown-block(0,0)'. Which of the following is the most likely cause?
Corrupt initramfs missing a necessary kernel module for the root device
This error indicates that the root filesystem cannot be found, often due to a missing driver for the storage device in the initramfs.
A Linux administrator wants to ensure a bash script stops execution immediately if any command fails. Which line should be added to the script?
set -e
The 'set -e' command causes the script to exit immediately when a command returns a non-zero exit status.
A developer is writing a Dockerfile. The application requires a configuration file that should be copied from the build context and the container should expose port 8080. Which combination of Dockerfile instructions is correct?
COPY config.txt /app/ and EXPOSE 8080
COPY adds files from the build context, and EXPOSE documents the port. Other instructions serve different purposes.
An administrator is writing a bash script that loops through all .log files in /var/log and prints the file name if the file is larger than 100 kilobytes. Which loop correctly implements this?
find /var/log -name '*.log' -size +100k -exec echo {} \;
The find command with -size filters files larger than 100k, and -exec with {} runs the command for each file. The other options have syntax errors or incorrect logic.
A Linux administrator needs to locate all files in the /var directory that have been modified within the last 30 minutes and are larger than 10MB. Which command accomplishes this task?
find /var -mmin -30 -size +10M
The find command with -mmin and -size options can locate files based on modification time and size. -mmin -30 finds files modified less than 30 minutes ago, and -size +10M finds files larger than 10MB.
A user reports that a script in /home/user/script.sh fails to execute. The output of 'ls -l script.sh' is '-rw-r--r-- 1 user user 1024 Apr 1 10:00 script.sh'. Which command should be used to make the script executable for all users?
chmod a+x script.sh
The file is currently not executable (rw-r--r--). To add execute permission for all users, use chmod a+x or chmod +x.
A system administrator needs to set the umask so that newly created files have permissions of 644 and directories have permissions of 755. Which umask value should be set?
0022
Default base permissions are 666 for files and 777 for directories. To get 644 (rw-r--r--) for files: 666 - 644 = 022. To get 755 (rwxr-xr-x) for directories: 777 - 755 = 022. So umask 022 works for both.
An administrator wants to grant a specific user, 'jdoe', read and write access to a file that is owned by root:root with permissions 640. The administrator does not want to change the file's owner or group. Which approach should be used?
Use setfacl -m u:jdoe:rw file
ACLs allow granting permissions to a specific user without changing the file's owner or group. setfacl -m u:jdoe:rw file sets read-write ACL for user jdoe.
The XK0-006 flashcard bank covers all 5 official blueprint domains published by CompTIA. Cards are distributed proportionally, so domains with higher exam weight have more cards.
Domain Coverage
Services and User Management
Security
Troubleshooting
Automation, Orchestration, and Scripting
System Management
Both flashcards and practice questions are evidence-based study tools. The difference is in what they train:
Flashcards — concept retention
Best for memorising definitions, acronyms, protocol behaviours, command syntax, and conceptual distinctions. Use flashcards to build the foundational vocabulary that XK0-006 questions assume you know.
Best in: weeks 1–3
Practice tests — application
Best for applying concepts to realistic scenarios, eliminating distractors, and building exam stamina.XK0-006 questions test scenario reasoning — not just recall — so practice tests are essential.
Best in: weeks 3–6
The most effective XK0-006 study plan combines both: use flashcards for the first 2–3 weeks to build conceptual foundations, then shift to practice tests and mock exams in the final 2–3 weeks to apply and benchmark that knowledge. Most candidates who pass on their first attempt use both tools.
Yes. Courseiva provides free XK0-006 flashcards across all official exam domains. Every card includes the correct answer and a full explanation of why it is right and why the distractors are wrong. The platform also includes topic-based practice, mock exams, and readiness tracking — no account required.
Courseiva has 979+ original XK0-006 flashcards across all 5 exam blueprint domains. New cards are added regularly as the question bank grows. All cards are written by certified engineers against the official CompTIA exam objectives.
Courseiva flashcards are purpose-built for IT certification exams. Unlike generic flashcard platforms where content quality varies, every Courseiva card is mapped to the official XK0-006 exam blueprint, written by engineers who hold the certification, and includes a full explanation of the correct answer and why the distractors are wrong. This explanation quality is what separates genuine learning from rote memorisation.
Courseiva is a web platform — an internet connection is required. For offline study, we recommend creating free Courseiva account, using the platform in your browser, and using your device's offline capabilities if your browser supports offline web apps.
Save your results, see which domains need more work, and get spaced repetition recommendations — all free.
Sign Up FreeFree forever · Every certification included