Linux Redhat System Administration II – SA2 (RHEL8)

Key tasks needed to become a full time Linux Administrator and to validate those skills via the Linux Certified System

What you'll learn:

• Scheduling Future Tasks
• Practice QA for Linux EXAM-200
• Adjusting Tuning Profiles
• Controlling Access to files with ACLs
• Managing SELinux Security
• Adding Partitions, File Systems, and Persistent mounts
• Creating Logical Volumes
• Controlling the Boot Process
• Managing Network Security
• Automating Installation with Kickstart
• Network File System
• KVM Virtualization
• Improving Command-line Productivity
• Introducing containers
• Lab - configure a basic container

Linux Certified System Administrator Exam (E-X: 200 - 2.5 Hours Required), there are two course modules as shown below.

• Linux System Administration I - SA1 (First part)

• Linux System Administration II - SA2 (Second part) ==> This Course Module will teach you this module.

  
  

Course Content

Linux System Administration II - SA2 with Practice QA for first level of Exam.

Introduction

• Overview about the Course Module

Scheduling Future Tasks

• Overview of Scheduling Tasks

• Scheduling a Deferred User Job

• Controlling Nice Values with Queue Designations

• Scheduling Recurring User Jobs

• Scheduling a job for a specific time - 1

• Scheduling a job for a specific time - 2

• Practice Lab Session - Scheduling a Recurring User Jobs

• Scheduling Recurring System Jobs

• Practice Lab Session - System Jobs

• Scheduling tasks with Systemd Timer

• Practice Lab Session - Systemd Timer

• Managing Temporary Files

• Cleaning Temporary Files with a Systemd Timer

• Lab - Configure systemd-tmpfiles to remove unused temporary files from /tmp

• Lab - Configure systemd-tmpfiles to periodically purge files from another directory

Adjusting Tuning Profiles

• Overview about tuning profiles

• Managing profiles from the command line

• Lab Session - Tune a server’s performance by activating the tuned service and apply a tuning profile to powersave.

• Process Scheduling & Multitasking

• Displaying Nice Levels from the Command Line

• Changing the Nice Level of an Existing Process

• Lab Session: Influencing Process Scheduling

Controlling Access to files with ACLs

• Access Control List Concepts

• Set ACLs on files

• Default ACLs

• Viewing and Interpreting ACL Permissions

• Lab - set acl on files

• Lab - set acl on directories

• Lab - Mask to limit the set of permissions

• Lab - default acl

• Guided Exercise on ACL

Managing SELinux Security

• SELinux Security Concepts

• SELinux Context

• SELinux Modes

• Apache service without SELinux Protection (DAC)

• Apache service with SELinux Protection (MAC)

• Practical approach to understand SELinux

• Lab - Change context temporary

• Lab - Change context permanently

• Lab - SELinux inheritance and its pitfalls

• SELinux Booleans

• Lab - SELinux Booleans

• Audit logs & Troubleshooting SELinux

Adding Partitions, File Systems, and Persistent mounts

• Partitioning a Disk

• Benefits of disk partitioning

• MBR Partitioning Scheme

• Primary & Extended Partitions

• GPT Partitioning Scheme

• How to identify what partitioning standard is used

• Managing Partitions with Parted

• Creating a file system

• Swap Space Concepts

• Create a Swap Partitions

• Setting the Swap Space Priority

Creating Logical Volumes

• The LVM Logical Volume Manager

• Features of LVM

• LVM Architecture Overview

• Architectural Overview via Diagram

• LVM Components - PV, VG, LV

• Lab 1 - Creation of PV, VG, LV

• Lab 2 - Create File System, Mount Point

• Lab 3 - Remove a Logical Volume

• Lab 4 - Extending and Reducing a Volume Group

• Lab 5 - Extending a LV and xfs & ext4 FS

• Lab 6 - Extend a swap space

Advanced Storage Features

• About Stratis

• Lab - Installing & Configuring Stratis

• Lab - Managing Stratis File Systems

• Lab - Persistently Mounting Stratis File Systems

• Lab - Stratis filesystem snapshot

• Guided Exercise - Create a thin-provisioned file system

• Guided Exercise - Verify file system grows dynamically

• Guided Exercise - Create & access data from Snapshot

• VDO - Virtual Data Optimizer

• Lab - Installation VDO

• Lab - Create & format a VDO Volume

• Lab - Testing Deduplication:

• Recap - Lab

• Lab - Extend & Remove VDO Volume

Controlling the Boot Process

• Booting Process of a RHEL 8 System

• Selecting a systemd target, rebooting & shutting

• Lab Exercise - Determine the default target and change the target into running system.

• Lab - Selecting a rescue mode at boot time

• Resetting a root password

• Repairing Systemd Boot Issues

• Booting RHEL 8 into Rescue Mode

• Booting RHEL 8 into Emergency Mode

• Enabling the Early Debug Shell

• Repair a File System Issues at boot

• Lab - Repair a File System

Managing Network Security

• Firewall Concepts

• Features and advantages of firewalld

• Pre-defined Zones

• Packet flow via firewalld

• Add, remove services from firewall server - Lab Session

• Add http service to allow access the website - Lab Session

• Port Forwarding - allow access a website running on 12345 port

• masquerading, network address translation

• Lab Session - masquerading, port forwarding

• rich rules

• Lab Session - rich rules

Automating Installation with Kickstart

• Overview Kickstart Server

• Architectural Overview

• Lab 1 - Configure dhcp server

• Lab 2 - Configure tftp, pxe boot server

• Lec 3 - Configure httpd, kick start configuration file

• Lab 4 - Configure http repository, start services

• Lab 5 - Boot the Client from Network

Network File System

• Overview of NFS

• nfsconf tool

• Lab - Accessing Network-Attached Storage

• Exercise - NFS Share

• Mounting NFS Shares with Automounter

• Automounter Benefits

• Lab - Automounter using indirect map

• Lab Session on Indirect Wildcard Maps

• Lab Session on Direct maps

KVM Virtualization

• Overview of Linux Virtualization

• Hypervisor Concept - type 1 & type 2

• Types of Virtualization

• KVM, QEMU & Libvirt Architecture

• virsh command to manager vm's

• Lab Session

Introducing Containers

• Introducing Container Technology

• Planning for containers

• Lab - configure a basic container

• Lab - mapping container host ports to the container

• Lab - stop, restart & remove container

Improving Command-line Productivity

• Writing Simple Bash Scripts

• Lab - Writing Simple Bash Scripts

• Simple Commands in Linux

• Variable, single and double quote, backslash

• Redirection output

• Redirection output - Lab

• Last lecture