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Exam Information
Official specifications published by CompTIA
Exam Format
90 min
Maximum of 90
720 (on a scale of 100-900)
Professional
Registration
$395 USD
Pearson VUE or online proctoring
English
Validity
3 years
Earn at least 60 Continuing Education (CE) units within 3 years; Pass the current version of the Linux+ exam; Pass a higher-level CompTIA certification
XK0-006 Exam Topics and Domains
XK0-006 is organized into 5 weighted domains.
1
System Management
23%
Explain basic Linux concepts
Basic boot processFilesystem Hierarchy Standard (FHS)Server architecturesDistributionsGraphical User Interface (GUI)Software licensing
- Identify components of the Linux boot process
- Describe the purpose of FHS directories
- Compare server architectures and their use cases
- Distinguish between RPM-based and dpkg-based distributions
- Explain GUI components including display servers and managers
- Differentiate software licensing models
Summarize Linux device management concepts and tools
Kernel modulesDevice managementinitrd managementCustom hardware
- Manage kernel modules using appropriate commands
- Use device management tools to query hardware information
- Manage initrd for boot customization
- Understand custom hardware including GPU monitoring
Given a scenario, manage storage in a Linux system
Logical Volume Manager (LVM)PartitionsFilesystemsUtilitiesRAIDMounted storageInodes
- Create and manage LVM logical volumes, volume groups, and physical volumes
- Partition disks using appropriate tools
- Create and manage various filesystem formats
- Configure mounted storage including network mounts
- Manage RAID arrays
Given a scenario, manage network services and configurations on a Linux server
Network configurationNetworkManagerNetplanCommon network tools
- Configure network settings using configuration files
- Manage network interfaces using NetworkManager and Netplan
- Use common network diagnostic tools
Given a scenario, manage a Linux system using common shell operations
Common environmental variablesPathsShell environment configurationsChannel redirectionBasic shell utilitiesText editors
- Work with environment variables
- Navigate the filesystem using absolute and relative paths
- Configure shell environment
- Use I/O redirection and piping
- Process text using common shell utilities
Given a scenario, perform backup and restore operations for a Linux server
ArchivingCompression toolsOther tools
- Create and manage archives using tar and cpio
- Compress and decompress files using various tools
- Perform disk imaging and data recovery
- Synchronize files using rsync
Summarize virtualization on Linux systems
Linux hypervisorsVirtual machines (VMs)VM operationsBare metal vs. virtual machinesNetwork typesVirtual machine tools
- Deploy and manage KVM/QEMU hypervisors
- Create and manage virtual machines
- Configure VM networking
- Use virtualization management tools
2
Services and User Management
20%
Given a scenario, manage files and directories on a Linux system
UtilitiesLinksDevice types in /dev
- Manage files and directories using command-line utilities
- Create and manage symbolic and hard links
- Understand device types in /dev
Given a scenario, perform local account management in a Linux environment
Add users and groupsDelete users and groupsModify users and groupsLock and ExpirationList and query usersUser profile templatesAccount filesAttributesAccount types
- Create, modify, and delete user and group accounts
- Manage account locking and expiration policies
- Query user information using various tools
- Understand account files and their security implications
Given a scenario, manage processes and jobs in a Linux environment
Process verificationProcess IDProcess statesPriority and limitsJob and process managementScheduling
- Monitor and manage running processes
- Control process priority and resource limits
- Manage background and foreground jobs
- Schedule automated tasks
Given a scenario, configure and manage software in a Linux environment
Installation, update, and removalRepository managementSoftware configuration and services
- Install, update, and remove software packages
- Manage package repositories and GPG keys
- Configure common Linux services
Given a scenario, manage Linux using systemd
Systemd unitsUtilitiesManaging unit states
- Manage systemd unit types
- Use systemd utilities for system configuration
- Control service states and boot targets
Given a scenario, manage applications in a container on a Linux server
RuntimesImage operationsContainer operationsVolume operationsContainer networksPrivileged vs. unprivileged
- Work with container runtimes including Docker and Podman
- Build and manage container images
- Perform container lifecycle operations
- Configure container volumes and networks
- Understand container security implications
3
Security
18%
Summarize authorization, authentication, and accounting methods
Authentication frameworksLoggingSystem audit
- Configure authentication using PAM, LDAP, and Kerberos
- Manage system logging and log rotation
- Implement system auditing
Given a scenario, configure and implement firewalls on a Linux system
firewalldUncomplicated Firewall (ufw)Netfilter moduleAddress translationStateful vs. statelessIP forwarding
- Configure firewalld with zones and rich rules
- Manage ufw rules
- Understand nftables and iptables
- Configure network address translation
- Enable IP forwarding
Given a scenario, apply operating system (OS) hardening techniques on a Linux system
Privilege escalationFile attributesPermissionsAccess controlSecure remote accessInsecure services avoidanceAdditional hardening
- Configure sudo and privilege escalation securely
- Manage file permissions including special permissions and ACLs
- Configure and troubleshoot SELinux
- Harden SSH access
- Reduce system attack surface
Explain account hardening techniques and best practices
PasswordsMultifactor authentication (MFA)Additional hardening
- Configure password policies
- Implement multifactor authentication
- Apply account hardening best practices
Explain cryptographic concepts and technologies in a Linux environment
Data at restData in transitHashingCertificate management
- Implement encryption for data at rest and in transit
- Use hashing for data integrity
- Manage certificates and remove weak algorithms
Explain the importance of compliance and audit procedures
Detection and responseVulnerability scanningStandards and auditFile integritySecure data destructionSoftware supply chain and security banners
- Implement malware detection and response
- Perform vulnerability scanning and assessment
- Apply compliance standards using OpenSCAP and CIS Benchmarks
- Monitor file integrity
- Implement secure data destruction
- Configure security banners
4
Automation, Orchestration, and Scripting
17%
Summarize the use cases and techniques of automation and orchestration in a Linux environment
Infrastructure as codeUnattended deploymentCI/CDDeployment orchestration
- Implement infrastructure as code using Ansible, Puppet, and OpenTofu
- Configure unattended deployments
- Understand CI/CD and GitOps concepts
- Work with container orchestration tools
Given a scenario, perform automated tasks using shell scripting
ExpansionControl structuresComparisonsRegular expressions and testsVariables
- Write shell scripts with proper expansion and substitution
- Implement control flow with conditionals and loops
- Use comparison operators correctly
- Handle variables and return codes
Summarize Python basics used for Linux system administration
Python environmentPython fundamentalsPEP 8 best practices
- Set up Python virtual environments
- Write basic Python scripts for system administration
- Follow PEP 8 best practices
Given a scenario, implement version control using Git
Git operations
- Implement Git version control for code and configuration management
- Perform branching, merging, and rebasing operations
Summarize best practices and responsible uses of artificial intelligence (AI)
Common use casesBest practicesPrompt engineering
- Identify appropriate use cases for AI in Linux administration
- Apply best practices when using AI-generated code
- Understand data governance implications of AI tools
5
Troubleshooting
22%
Summarize monitoring concepts and configurations in a Linux system
Service monitoringData acquisition methodsConfigurations
- Implement service monitoring with appropriate metrics
- Configure data acquisition for monitoring
- Set up alerting and notification systems
Given a scenario, analyze and troubleshoot hardware, storage, and Linux OS issues
Common issues
- Diagnose and resolve kernel panics and corruption
- Troubleshoot filesystem mounting and storage issues
- Resolve boot failures including GRUB misconfiguration
- Address process and memory issues
Given a scenario, analyze and troubleshoot networking issues on a Linux system
Common issues
- Troubleshoot firewall and DNS issues
- Resolve network interface misconfigurations
- Diagnose routing and connectivity problems
- Address dual-stack IPv4/IPv6 issues
Given a scenario, analyze and troubleshoot security issues on a Linux system
Common issues
- Troubleshoot SELinux denials
- Resolve file permission and access issues
- Identify and remediate security vulnerabilities
- Fix certificate and cipher problems
Given a scenario, analyze and troubleshoot performance issues
Common symptoms
- Identify performance bottlenecks using appropriate tools
- Diagnose CPU, memory, disk, and network performance issues
- Analyze system metrics against baselines
- Resolve common performance symptoms
How do I earn this certification?
Passing XK0-006 earns the CompTIA Linux+ certification. It sits in the Infrastructure / Linux Administration track.
Next Level Options
- SY0-701 - CompTIA Security+Security specialization building on Linux hardening skills
- CV0-004 - CompTIA Cloud+Cloud infrastructure building on Linux and virtualization skills
- CS0-003 - CompTIA CySA+Cybersecurity analyst role leveraging Linux security knowledge
- CAS-004 - CompTIA CASP+Advanced security practitioner for enterprise environments
Alternative Paths
- EX200 - RHCSA - Red Hat Certified System AdministratorRed Hat-specific Linux administration certification, deeper RHEL focus
- EX294 - RHCE - Red Hat Certified EngineerAdvanced Red Hat certification focusing on Ansible automation
- LFCS - Linux Foundation Certified System AdministratorVendor-neutral alternative with performance-based exam format
- CKA - Certified Kubernetes AdministratorContainer orchestration specialization building on Linux+ container knowledge
Practice with Precision
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How to study for this exam?
The most effective way to prepare for XK0-006 is by using the PlanetCert Simulator to practice questions and review detailed explanations.
What's changed on this exam?
Current Status
- ACTIVE
- Last content update: 2025-07-15
Updates
- OpenTofu Candidates should understand OpenTofu provider, resource, state, and API concepts
- WireGuard Candidates should understand WireGuard as a modern VPN alternative
- Wayland Candidates should understand differences between X11 and Wayland
- Podman Candidates should understand rootless container operation with Podman
- Netplan Candidates should understand Netplan YAML configuration alongside traditional NetworkManager
- RISC-V Candidates should be aware of RISC-V as an emerging server architecture
Who should take this exam?
- 12 months of hands-on experience working with Linux servers
- CompTIA A+ certification or equivalent knowledge
- CompTIA Network+ certification or equivalent knowledge
- CompTIA Server+ certification or equivalent knowledge