Linux Redhat System Administration II – SA2 (RHEL8)

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