GL124 - Red Hat Enterprise Linux Systems Admin I

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This GL124 course is designed to follow an identical set of topics as the Red Hat® RH124 course with the added benefit of very comprehensive lab exercises and detailed lecture material.

The Red Hat Enterprise Linux (RHEL) system administration topics covered in this course along with the GL134 course cover the certification objects of the Red Hat Certified System Administrator (RHCSA) exam.

The topics covered include essential command line tools, installing RHEL, remote administration techniques, managing local storage, system monitoring, basic user and security, administration, connecting to a network and deploying FTP and Web servers.

Current Version: A03

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Students must be proficient in general computing skills but not necessarily experienced with Linux or Unix.

Supported Distributions:
Red Hat Enterprise Linux 8
Recommended Class Length:
5 days
Detailed Course Outline:
  1. Access the command line
    1. Components of a Distribution
    2. Red Hat Linux Products
    3. Logging In
    4. Running Programs
    5. Interacting with Command Line
    6. Desktop Environments
    7. GNOME
    8. got root?
    9. Switching User Contexts
    10. sudo
    Lab Tasks
    1. Login and Discovery
    2. Switching Users With su
  2. Manage files from the command line
    1. Managing Files Graphically
    2. Drag and drop with Nautilus
    3. Physical Unix File Structure
    4. Unix/Linux Filesystem Features
    5. Navigating the Filesystem
    6. Displaying Directory Contents
    7. Directory Manipulation
    8. File Manipulation
    9. Deleting and Creating Files
    10. Filesystem Links
    Lab Tasks
    1. Navigating Directories and Listing Files
    2. Manipulating Files and Directories
  3. Get help in a textual environment
    1. Gathering Login Session Info
    2. Red Hat Online Documentation
    3. Getting Help Within the Graphical Desktop
    4. Gathering System Info
    5. Help from Commands and Documentation
    6. Getting Help with man & info
    7. $MANPATH, whatis and apropos
    Lab Tasks
    1. Help with Commands
  4. Create, view, and edit text files
    1. The gedit Text Editor
    2. Pico/GNU Nano
    3. Pico/Nano Interface
    4. Nano configuration
    5. Pico/Nano Shortcuts
    6. Communication Channels
    7. File Redirection
    8. Piping Commands Together
    9. The Streaming Editor
    10. Text Processing with Awk
    11. Producing File Statistics
    12. Replacing Text Characters
    13. Text Sorting
    14. Duplicate Removal Utility
    15. Extracting Columns of Text
    16. Combining Files and Merging Text
    17. Comparing File Changes
    Lab Tasks
    1. Text Editing with Nano
    2. Text Processing
  5. Manage local Linux users and groups
    1. User and Group Concepts
    2. User Administration
    3. Modifying Accounts
    4. Group Administration
    5. User Private Group Scheme
    6. Password Aging
    Lab Tasks
    1. User and Group Administration
    2. User Private Groups
  6. Control access to files with Linux file system permissions
    1. File Ownership
    2. File and Directory Permissions
    3. SUID and SGID on files
    4. SGID and Sticky Bit on Directories
    5. Changing File Permissions
    Lab Tasks
    1. File and Directory Ownership and Permissions
  7. Monitor and manage Linux processes
    1. What is a Process?
    2. Process States
    3. Viewing Processes
    4. System Status – CPU
    5. System Status – Memory
    6. Signals
    7. Tools to Send Signals
    8. Managing Processes
    9. Tuning Process Scheduling
    10. Job Control Overview
    11. Job Control Commands
    Lab Tasks
    1. Job Control Basics
    2. Process Management Basics
  8. Control services and daemons
    1. init
    2. Linux Runlevels Aliases
    3. systemd System and Service Manager
    4. systemd Targets
    5. Using systemd
    6. Legacy Support for SysV init
    Lab Tasks
    1. Managing Services With Systemd's systemctl
    2. Creating a systemd unit file
  9. Configure and secure OpenSSH service
    1. Secure Shell
    2. OpenSSH Client & Server Configuration
    3. Accessing Remote Shells
    4. Transferring Files
    5. Alternative sftp Clients
    6. SSH Key Management
    7. ssh-agent
    Lab Tasks
    1. Introduction to ssh and scp
    2. SSH Key-based User Authentication
    3. Using ssh-agent
  10. Analyzing and Storing Logs
    1. System Logging
    2. systemd Journal
    3. systemd Journal's journalctl
    4. Secure Logging with Journal's Log Sealing
    5. Cockpit - Logs
    6. Syslog-ng
    7. Rsyslog
    8. /etc/rsyslog.conf
    9. Log Management
    10. Log Anomaly Detector
    11. Hardware and System Clock
    12. Time Synchronization with Chronyd
    Lab Tasks
    1. Using the systemd Journal
    2. Setting up a Full Debug Logfile
    3. Remote Syslog Configuration
  11. Manage Red Hat Enterprise Linux networking
    1. IPv4 Fundamentals
    2. TCP/UDP Fundamentals
    3. IPv6
    4. Linux Network Interfaces
    5. Ethernet Hardware Tools
    6. Network Configuration with ip Command
    7. Starting and Stopping Interfaces
    8. Configuring Routing Tables
    9. IP to MAC Address Mapping with ARP
    10. DNS Clients
    11. DHCP Clients
    12. Continual Time Sync with NTP
    13. Network Diagnostics
    14. NetworkManager
    Lab Tasks
    1. Network Discovery
    2. Basic Client Networking
    3. Introduction to Troubleshooting Labs
    4. Troubleshooting Practice: Networking
  12. Archive and copy files between systems
    1. Archives with tar
    2. Archives with cpio
    3. The gzip Compression Utility
    4. The bzip2 Compression Utility
    5. The XZ Compression Utility
    6. The PKZIP Archiving/Compression format
    Lab Tasks
    1. Archiving and Compression
    2. Using rsync and ssh for Backups
  13. Install and update software packages
    1. Managing Software
    2. RPM Features
    3. RPM Architecture
    4. RPM Package Files
    5. Working With RPMs
    6. Querying and Verifying with RPM
    7. Managing Software Dependencies
    8. Using the Yum & DNF commands
    9. Yum package groups
    10. Updating the Kernel RPM
    11. Dealing With RPM & Yum Digest Changes
    12. DNF Repositories
    13. DNF Repository Groups
    14. DNF Plugins & RHSM Subscription Manager
    15. DNF Version Lock Plugin
    Lab Tasks
    1. Managing Software with RPM
    2. Querying the RPM Database
    3. Using Yum
  14. Access Linux file systems
    1. Filesystem Creation
    2. Mounting Filesystems
    3. Mounting Filesystems
    4. Filesystem Maintenance
    5. Managing an XFS Filesystem
    6. Persistent Block Devices
    7. Filesystem Structures
    8. Determining Disk Usage With df and du
    9. Filesystem Table (/etc/fstab)
    Lab Tasks
    1. Creating and Managing Filesystems
  15. Manage virtual machines
    1. Introducing libvirt
    2. libvirt: Basic Concepts
    3. libvirt: Storage Architecture
    4. libvirt: Network Architecture
    5. libvirt: Graphical Tools
    6. libvirt: Command Line Tools
    7. virsh: Basics
    8. virsh: Common Tasks
    9. virt-install
    10. Virtual Machine Guest Tools & Drivers
    11. libguestfs and guestfish
    Lab Tasks
    1. Installing a Virtual Machine
  16. Comprehensive review
    1. System Administration I
    Lab Tasks
    1. Understand And Use Essential Tools
    2. Operate Running Systems
    3. Users, Groups, and File Permissions