Explain Linux boot process concepts.
– Boot loaders
– Boot options
– File locations
– Boot modules and files
– Kernel panic
Given scenario, install, configure, and monitor kernel modules.
– Commands
– Locations
Given a scenario, configure and verify network connection parameters.
– Diagnostic tools
– Configuration files
– Bonding
Given a scenario, manage storage in a Linux environment.
– Basic partitions
– File systemn hierarchy
– Device mapper
– Tools
– Location
– File system types
Compare and contrast cloud and virtualization concepts and technologies.
– Templates
– Bootstrapping
– Storage
– Network considerations
– Types of hypervisors
– Tools
Given a scenario, configure localization options.
– File locations
– Commands
– Environment variables
– Character sets
Given a scenario, conduct software installations, configurations, updates, and removals.
– Package types
– Installation tools
– Build tools
– Repositories
– Acquisition commands
Given a scenario, manage users and groups.
– Creation
– Modification
– Deletion
– Queries
– Quotas
– Profiles
– Important files and file contents
Given a scenario, create, modify, and redirect files.
– Text editors
– File readers
– Output redirection
– Text processing
– File and directory operations
Given a scenario, manage services.
– System management
– SysVinit
Summarize and explain server roles.
– NTP
– SSH
– Web
– Certificate authority
– Name server
– DHCP
– File servers
– Authentication server
– Proxy
– Logging
– Containers
– VPN
– Monitoring
– Database
– Print server
– Mail server
– Load balancer
– Clustering
Given a scenario, automate and schedule jobs.
– cron
– at
– crontab
– fg
– bg
– &
– kill
– Ctrl+c
– Ctrl+z
– nohup
Explain the use and operation of Linux devices.
– Types of devices
– Monitoring and configuration tools
– File locations
– Hot pluggable devices
Compare and contrast Linux graphical user interfaces.
– Servers
– GUI
– Remote desktop
– Console redirection
– Accessibility
Given a scenario, apply or acquire the appropriate user and/or group permissions and ownership.
– File and directory permissions
– Context-based permissions
– Privilege escalation
– User types
Given a scenario, configure and implement appropriate access and authentication methods.
– PAM
– SSH
– TTYs
– PTYs
– PKI
– VPN as a client
Summarize security best practices in a Linux environment.
– Boot security
– Additional authentication methods
– Importance of disabling root login via SSH
– Password-less login
– Chroot jail services
– No shared IDs
– Importance of denying hosts
– Separation of OS data from application data
– Change default ports
– Importance of disabling or uninstalling unused and unsecure services
– importance of enabling SSL/TLS
– Importance of enabling auditd
– CVE monitoring
– Discouraging use of USB devices
– Disk encryption
– Restrict cron access
– Disable Ctrl+Alt+Del
– Add banner
– MOTD
Given a scenario, implement and configure Linux firewalls.
– Access control lists
– Technologies
– IP forwarding
– Dynamic rule sets
– Common application firewall configurations
Given a scenario, backup, restore, and compress files.
– Archive and restore utilities
– Compression
– Backup types
– Off-site/off-system storage
– Integrity checks
Given a scenario, analyze system properties and remediate accordingly.
– Network monitoring and configuration
– Storage monitoring and configuration
– CPU monitoring and configuration
– Memory monitoring and configuration
– Lost root password
Given a scenario, analyze system processes in order to optimize performance.
– Process management
Given a scenario, analyze and troubleshoot application and hardware issues.
– Permissions
– Access
– Authentication
– File creation
– Insufficient privileges for authorization
– Environment and shell issues
Given a scenario, analyze and troubleshoot application and hardware issues.
– SELinux context violations
– Storage
– Firewall
– Permission
– Dependencies
– Troubleshoot additional hardware issues
Given a scenario, deploy and execute basic BASH scripts.
– Shell environments and shell variables
– #!/bin/bash
– Sourcing scripts
– Directory and file permissions
– Extensions
– Commenting
– File globbing
– Shell expansions
– Redirection and piping
– Exit codes
– Metacharacters
– Positional parameters
– Looping constructs
– Conditional statements
– Escaping characters
Given a scenario, carry out version control using Git.
– Arguments
– Files
Summarize orchestration processes and concepts.
– Agent
– Agentless
– Procedures
– Attributes
– Infrastructure automation
– Infrastructure as code
– Inventory
– Automated configuration management
– Build automation