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CompTIA Linux+

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CompTIA Linux+ Certification Facts

The CompTIA Linux+ certification evaluates the individuals’ expertise in the domain of Linux. It includes basic maintenance and Linux command line. Furthermore, it gives attention to installing and configuring workstations and networking. This certificate checks the proficiency of the specialists in configuring, supporting, and monitoring servers running the Linux operating system. To obtain this certification, the applicants should nail one qualifying exam, and namely CompTIA XK0-004.


The professionals need to have the competence in configuring network parameters, kernel modules, storage, and virtualization and Cloud technologies. Besides that, they should be familiar with executing basic BASH scripts, version control using Git, and orchestration processes. Moreover, the individuals need to possess knowledge of best practices for permissions and authentication, file management, and firewalls, as well as job scheduling, server roles, and the use and operation of Linux devices. In addition, the specialists should have at least 12 months of Linux admin experience.

Exam Overview

CompTIA XK0-004 has the length of 90 minutes. During this time, the students need to answer a maximum of 90 questions. The test is available in Spanish, Portuguese, English, and Japanese. The price for registration is $338. This certification exam consists of 5 topics. The following are the highlights of the domains that are covered in this test:

Hardware and System Configuration: The first part is about:

  • Explaining Linux boot process concepts. It includes boot options, boot loaders, file locations, kernel panic, and boot modules and files
  • Installing, configuring, and monitoring kernel modules
  • Configuring and verifying network connection parameters
  • Managing storage in a Linux environment
  • Comparing and contrasting Cloud and virtualization concepts and technologies
  • Configuring localization options

Systems Operation and Maintenance: This subject area focuses on:

  • Conducting software installations, configurations, updates, and removals
  • Managing users and groups
  • Creating, redirecting, and modifying files
  • Managing services
  • Summarizing and explaining server roles. These cover Web, SSH, NTP, DHCP, VPN, name server, certificate authority, authentication server, file servers, and proxy. In addition, these include containers, logging, monitoring, clustering, load balancer, print server, database, and mail server
  • Automating and scheduling jobs
  • Explaining the use and operation of Linux devices
  • Comparing and contrasting Linux graphical user interfaces

Security: This section gives attention to:

  • Applying or acquiring the appropriate user and/or group permissions and ownership
  • Configuring and implementing the appropriate access and authentication methods
  • Summarizing security best practices in a Linux environment. These include boot security, additional authentication methods, password-less login, importance of disabling root login via SSH, chroot jail services, importance of denying hosts, no shared IDs, separation of OS data from application data, and importance of disabling or uninstalling unused and unsecure services. Besides that, these cover changing default ports, importance of enabling AuditD, CVE monitoring, importance of enabling SSL/TLS, adding banner, MOTD, disabling Ctrl+Alt+Del, disk encryption, discouraging use of USB devices, and restricting cron access
  • Implementing logging services
  • Implementing and configuring Linux firewalls
  • Backup, restoring, and compressing files

Preparation Options

The specialists who want to prepare for the CompTIA Linux+ certification test can do it using various resources. Some of them are available on the official webpage. These are an exam blueprint, e-learning training, and study guide. You may begin your preparation process utilizing the skills outline. This file consists of a review of the subject areas of the test. Furthermore, it contains the acronym lists related to the exam. This tool is designed to get familiar with the test and determine in which sections you have weak points. To get the blueprint, you need to fill out the special form on the CompTIA site. After that, you can move forward to more comprehensive preparation options. For instance, you may think about CertMaster Learn for Linux+. This is a self-paced online training. It comes with 15 hours of engaging content and videos, 15 lessons with scenario-based and performance-based questions, 150 practice questions, and a 90-question final assessment. On the other hand, you can consider using the study guide. This book is for self-preparation. It focuses on managing users and groups, permissions and ownership, storage, files and directories, and kernel modules. Besides that, it covers managing the Linux boot process, devices, networking, system components, packages, and software. Furthermore, the guidebook takes a look at planning and performing a Linux installation, securing Linux systems, automating tasks, and writing and executing Bash shell scripts.

Moreover, the professionals can explore some third-party IT training platforms to find other preparation tools. These can be practice tests, exam dumps, tutorials, articles, and so on. All in all, select the option that will fit your needs. It should be noted that the individuals need to be careful when choosing the materials from the third-party websites. Be sure to only use resources from reliable sites.

Career Opportunities

CompTIA Linux+ validates one's skills in the domain of Linux. There are various job roles that can utilize this certificate. Some of them are a Linux Administrator, a Technical Support Specialist, a Network Administrator, a Systems Administrator, a Web Administrator, and a Systems Engineer. At the same time, these include a Cybersecurity Engineer, a Network Security Analyst, a Network Engineer, a Cybersecurity Analyst, and a Software Engineer, among others. According to the PayScale website, the median remuneration for the Network Administrators is $60,000 per annum, while the Systems Administrators can count on $62,000 per year. As for the average salary for the Network Engineers, it is $75,000 per annum.

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