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RHCSA / EX200 Study Guide

A complete presentation library organized around the Red Hat Certified System Administrator (EX200) exam objectives. Modules are grouped by objective area, from essential command-line tools through storage, networking, and security. Used as the shared reference library for CIS126RH, CIS238RH, and CIS240RH.

Understand and Use Essential Tools

Access a Shell Prompt and Issue Commands with Correct Syntax
Use Input-Output Redirection
Use grep and Regular Expressions to Analyze Text
Access Remote Systems Using SSH
Log In and Switch Users in Multi-User Targets
Archive, Compress, Unpack, and Uncompress Files
tar, gzip, bzip2
Create and Edit Text Files
Create, Delete, Copy, and Move Files and Directories
Create Hard and Soft Links
List, Set, and Change Standard ugo/rwx Permissions
Locate, Read, and Use System Documentation
man, info, /usr/share/doc

Manage Software

Configure Access to RPM Repositories
Install and Remove RPM Software Packages
Configure Access to Flatpak Repositories
Install and Remove Flatpak Software Packages

Create Simple Shell Scripts

Conditionally Execute Code
Use Looping Constructs to Process File and Command Line Input
Process Script Inputs
Process Output of Shell Commands Within a Script

Operate Running Systems

Boot, Reboot, and Shut Down a System Normally
Boot Systems into Different Targets Manually
Interrupt the Boot Process to Gain Access to a System
Identify CPU/Memory Intensive Processes and Kill Processes
Adjust Process Scheduling
Locate and Interpret System Log Files and Journals
Preserve System Journals
Start, Stop, and Check the Status of Network Services
Securely Transfer Files Between Systems

Configure Local Storage

List, Create, and Delete Partitions on GPT Disks
Create and Remove Physical Volumes
Assign Physical Volumes to Volume Groups
Create and Delete Logical Volumes
Mount File Systems at Boot by UUID or Label
Add Partitions, Logical Volumes, and Swap Non-Destructively

Create and Configure File Systems

Create, Mount, Unmount, and Use VFAT, ext4, and XFS File Systems
Mount and Unmount Network File Systems Using NFS
Configure autofs
Extend Existing Logical Volumes
Diagnose and Correct File Permission Problems

Deploy, Configure, and Maintain Systems

Schedule Tasks Using at, cron, and systemd Timer Units
Start/Stop Services and Configure Services to Start Automatically at Boot
Configure Systems to Boot into a Specific Target Automatically
Configure Time Service Clients
Install and Update Software Packages from Content Delivery Network, Remote Repo, or Local File System
Modify the System Bootloader

Manage Basic Networking

Configure IPv4 and IPv6 Addresses
Configure Hostname Resolution
Configure Network Services to Start Automatically at Boot
Restrict Network Access Using firewalld and firewall-cmd

Manage Users and Groups

Create, Delete, and Modify Local User Accounts
Change Passwords and Adjust Password Aging
Create, Delete, and Modify Local Groups and Group Memberships
Configure Privileged Access

Manage Security

Configure Firewall Settings Using firewall-cmd/firewalld
Manage Default File Permissions
Configure Key-Based Authentication for SSH
Set Enforcing and Permissive Modes for SELinux
List and Identify SELinux File and Process Context
Restore Default File Contexts
Manage SELinux Port Labels
Use Boolean Settings to Modify SELinux Settings

Reference