Highlights

• Key tasks needed to become a full time Linux Administrator
• Validate those skills via the Linux Certified System
• Unlimited access

Objectives

• Scheduling Future Tasks,
• Adjusting Tuning Profiles,
• Managing SELinux Security,
• Creating Logical Volumes

Program

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

Targeted audience

There is no formal prerequisites for this course; however, previous system administrator experience on other operating system would be very beneficial.

Reviews

Harish Patidar Overall good course - I have completed both SA1 and SA2 and have learned many things. Hopefully i will work on this skill soon. Thanks You sikhar sir.

Shailendra Mishra It is surely a good course on Linux Admin.

Kogulakannan Gajendran One of the excellent courses in Udemy to kick start your Linux career!!! Being a RHEL admin myself, It's a great refresher. Well done and Thank you!!!