Complete Linux Training with Troubleshooting Skills | Udemy

Complete Linux Training with Troubleshooting Skills | Udemy [Update 07/2023]
English | Size: 14.5 GB
Genre: eLearning

A project-based approach to acquire Linux skills to enhance your career and advance: Over 40 hours with 400+ lectures.

What you’ll learn
Linux Administration with Troubleshooting Skills
Linux basic concepts,Introduction & History of Unix/Linux
Linux Interview Questions and Answers
Bash profile, Variables & Standard Input output Redirecting
Linux User Administration
Permissions in Red Hat Linux
Controlling Access to files with ACLs
Process Management
Kernel Modules
Disk Partitions, File Systems Creations & RAID Configuration
Logical Volume Manager Administration
RPM (Red Hat Package Manager)
YUM (Yellowdog Updater, Modified)
Linux OS Minor Upgrade
FTP – File Transfer Protocol
Apache Web Server Administration
DNS (Domain Name System)
Samba Server Concepts & Configuration
Network File System (NFS)
Automating Installation using kickstart
Networking Concepts in Linux
Linux Performance Monitoring
Troubleshooting Linux Boot Problems in Linux (Basic System Recovery)
Overview of Red Hat Enterprise Linux 7
GRand Unified BootLoader (Grub2)
Kdump configuration on RHEL 7
Overview of Red Hat Satellite 6.2
Managing SELinux Security
Backup and Restore
Linux Commands Tutorials
Advanced Linux Commands
Linux Crontab
Postfix Mail Server Configuration

By the end of the course, you will:

· Be able to confidently use the Linux operating system to increase your productivity and Career.

· Be able to perform everyday computing tasks from the Linux command line.

Course Content

Linux basic concepts, Introduction & History of Unix/Linux

· Introduction to Unix

· History of UNIX

· What is LINUX

· History of Linux

· LINUX Distributions

· Unix File System

Linux Commands Tutorials

· Lecture on various commands with proper explanation with examples in a live environment.

· Overview of File System Structure

· pwd, cd, ls, less, cp, file mkdir. more. mv, cat, rm rmdir, wc, dd, head, tail, touch, ln etc

Bash profile, Variables & Standard Input-output Redirecting

· User’s home directory

· .bash_profile, .bashrc & .bash_logout

· How to set PATH & alias in .bashrc profile

· Familiar with Variables

· Bash variable, Environmental variable & System Variables

· Lab

· Standard Input & Output Redirecting ( > , 2> ,&> )

· Standard Input and Output

· Redirecting Output to a File

· Redirecting Output to a File

· Lab

Linux User management

· Understanding different types of groups and creation of groups

· Creation of users in different groups

· Understanding Passwd, Shadow Files

· Understanding passwd aging

· Creation of quotas for users, groups, and file systems

· Understanding users security files

· password aging policy using chage commands


Permissions in Red Hat Linux

· Basic File Permissions

· User-Based permissions groups

· Permission Types

· Change of permissions & ownership

· Special Permissions

· Setuid, Setguid, Sticky bit, ACL, etc

· Two Labs to demonstrate the permissions from a real IT industry environment.

Controlling Access to files with ACLs

· Access Control List Concepts

· Set ACLs on files

· Default ACL

· Practice Lab Session on set acl on files

· Practice Lab Session on set acl on directories

· Practice Lab Sessions on a mask to limit the set of permissions

· Practice Lab Session on default ACL

· Practice Exercise – Scenario-based activity

Linux Crontab

· Overview of Linux Crontab & its format

· Schedule a job for a specific period of time

· Schedule a job for more than one instance (e.g. twice a day)

· Schedule a job for a specific range of time

· Schedule a job every weekday during working hours

· how to view crontab entries?

· Schedule a job for every minute using cron

Linux Find Commands

· Basic find commands for finding files with names

· Find files based on their permissions

· Search files based on owners & groups

· Find files and directories based on date & time

· Find files and directories based on size


· Overview of OpenSSH

· What Are Some Of The OpenSSH Features?

· OpenSSH options are controlled through the sshd_config file

· Lab Session


· Overview about telnet

· Configuration of telnet server on Linux

· Xinetd Service

Process Management

· Understanding ps commands with custom properties & Nice values etc

· Different stats of a process like “D”, “S”, “T”, “Z” etc

· Kill commands to terminate the process

· Lab

Kernel Modules

· What is Kernel & its features

· Kernel Modules

· Commands to manipulate the kernel (insmod,lsmod,modinfo,modprobe &rmmod)

· How to know the name of the module or kernel driver for any device like lan

· Lab

Disk Partitions, File Systems Creations & RAID Configuration

· Creating the partitions in a simple disk using fdisk

· Understanding the different options in fdisk utility

· Creating File Sytems using (ext3/ext4/xfs FS)

· Mounting/Umounting FS

· Entry in fstab

· Introduction to RAID

· Concepts & features of RAID

· RAID Level

· How to configure the different levels of Raids like (0,1,5,6, 10, etc.)

· Lab Sessions

Logical Volume Manager Administration

· LVM Architecture Overview

· LVM Components

· LVM Logical Volumes

· Logical Volume Creation Overview

· Growing a File System on a Logical Volume

· Logical Volume Backup

· LVM Administration with CLI Commands

· Using CLI Commands

· Physical Volume Administration

· Creating Physical Volumes

· Displaying Physical Volumes

· Preventing Allocation on a Physical Volume

· Resizing a Physical Volume

· Removing Physical Volumes

· Volume Group Administration

· Creating Volume Groups

· Adding Physical Volumes to a Volume Group

· Displaying Volume Groups

· Removing Physical Volumes from a Volume Group

· Changing the Parameters of a Volume Group

· Activating and Deactivating Volume Groups

· Removing Volume Groups

· Overview of LVM Metadata

· Metadata Contents

· How to identify and recover failed LVM disk

RPM (Red Hat Package Manager)

· Install: It is used to install any RPM package.

· Remove: It is used to erase, remove or un-install any RPM package.

· Upgrade: It is used to update the existing RPM package.

· Verify: It is used to query about different RPM packages.

· Query: It is used for the verification of an RPM package.

YUM (Yellowdog Updater, Modified)

· Overview of YUM

· Configuration& and installation of yum on Red Hat Linux Server

· Lab-1

· Lab-2

· Yum History Command

· Reverting and Repeating Transactions like undo & redo using yum command

Linux OS Minor Upgrade

· Linux OS upgrade from RHEL 7.1 to RHEL 7.2

· Lab Practice Sessions

File Transfer Protocol

· Overview of FTP Server

· Installation and configuration of FTP Server

· Lab-1

· Lab-2

Apache Web Server Administration

· Basic Setup

· Verify installation

· Package files

· Main configuration file(s)

· Backup

· Edit the httpd.conf configuration file

· ServerRoot

· PidFile

· ServerName

· Add site to the host’s file

· DocumentRoot

· ErrorLog

· Listen

· Create your HTML documents

· Start the Web Server

· Access the website

· Local access

· Internal & external access

· Summary of basic setup

DNS (Domain Name System)

· Overview of DNS

· Understanding root & top-level domains

· How DNS works practically

· What happens when I type any website name in the address bar of the browser

Samba Server

· Overview of Samba Server

· Features of Samba Server

· How Samba Server Works

· Samba File sharing Server

· CIFS File System

· Practice Lab Sessions

Postfix Mail Server Configuration

· The structure of the Email System

1.1 Mail User Agent

1.2 Mail Transfer Agent

1.3 Mail Delivery Agent

1.4 SMTP

· Configuring an RHEL Email System

· Postfix Pre-Installation Steps

· Installing Postfix on RHEL 7

· Configuring Postfix

· Starting Postfix on an RHEL System

· Configure a Null Client

· Relayhost

· Introduction Dovecot, Imap & pop3

· Configuring Dovecot

· Thunderbird – Mail User Agent (Configure Mail Box)

Securing & hardening a Linux System

· Linux Physical Security

· How to break root password

· Securing the grub menu

· Reset root password from rescue mode

· BIOS Protection

· General Security

· Keep your system updated

· Turn off IPv6

· Disable USB Stick to detect

· Restrict Users to Use Old Passwords

· Check Password Expiration of a User

· Password Expiration – Lab Session

· Verify accounts for an empty password

· Verify accounts with “Zero” UID

· Review logs regularly

· Keep /boot as read-only

Managing Server Firewalls

· Firewall concepts

· About nftables, features, and advantages of firewalld

· Firewalld components, pre-defined zones

· How packet flows through the firewall

· Check firewalld services – Lab Session

· Adding and Removing Services & Port from Firewall Server – Lab Session

· Add Services Permanently in Firewalld – Lab Session

· Add HTTP Service in firewalld – Lab Session

· Port forwarding – Lab Session

· Conceptual discussion about Masquerading, Packet Flow in Firewalld

· Masquerading with Port Forwarding – Lab Session

· About Rich Rules in Firewalld

· Specifically allow a Server using Rich Rules – Lab Session

· Allow Telnet Port, SSH with log-prefix using Rich Rule – Lab Session

· Accept, Reject, Drop – Lab Session

Network File System (NFS) on Linux

· Overview of NFS Server

· Installation and configuration of NFS Server

· Lab-1

· Lab-2

Automating Installation using Kickstart

· Overview of Kickstart Server

· Features of Kickstart Server

· Configuration & Installation of Kickstart Server

· Configuration of dhcp, tftpd, nfs for Kickstart Server

· Configuration of kickstart config file using graphical mode

· PXE Boot Environment

· Lab Session

· Unattended Client boot and do the installation via network

Networking Concepts in Linux

· New Sets of commands introduced in RHEL 7 for managing the network interfaces.

· Check the status of ethernet interfaces

· Add and configure the new ethernet interface

· Activate the network services

· Commands to change the network properties of an existing interface

· Delete the ethernet interface

· Learning various new commands related to managing network interfaces.

· Overview of Routing Table

· Understanding the output of netstat -rn or route -n output

· Lab

Linux Performance Monitoring

· Introduction about Performance monitoring in Linux

· Important four subsystems that need to be monitored.

1. CPU
2. Memory
3. IO
4. Network

· Familiar & understanding with CPU Utilization

· Like Context switches, Run Queue, CPU utilization & Load Average

· Familiar & understanding with Memory Utilization

· Familiar & understanding with I/O Analyses

· Familiar & understanding with Network Monitoring

· Familiar with various Commands to manage performance issues in Linux Servers

· top

· vmstat

Managing SELinux Security

· Introduction – SELinux

· SELinux Security Concepts

· Changing SELinux Modes

· Practice Lab Sessions

· Changing SELinux Contexts

· SELinux Booleans

· Audit logs & troubleshooting SELinux

Backup and Restore

· Overview of Backup

· Various commands for backup

· Types of backup

· Full backup, Incremental backup, and differential backup

dump command to take backup & restoration

Advanced Linux Commands

· dig, nslookup, rsync, scp, ssh, sftp, find, grep, locate, df, du, lsof, ps, top, who,cut, sort, vi, sed, awk, tar, gzip, bzip2 etc

· useradd, userdel, usermod, groupadd, groupdel, id, chage, chroot, chown etc

· mount, umount, fdisk, mkfs, fsck,/proc, uptime etc

· ping, nslookup, telnet, ifconfig, ifconfig-a, netstat -a etc

· systemctl -at service, systemctl -t service –state=active, systemctl start name.service, systemctl enable name.service etc

· pvs, vgs, pvdisplay,lvs, lvdisplay, pvcreate, pvremove, vgcreate, vgrename, vgremove, vgextend, vgreduce, lvcreate, lvextend, lvreduce,fdisk, vgexport, vgimport, vgcfgrestore, vgcfgbakcup, watch, whoami, passwd, su etc.

Linux Bash Shell Scripting: A Practical way of Learning

Introduction of Shell Programming

· What is Bash Shell?

· Types of Shell available in Linux

· About Shell Scripting

· Bash Shell Startup Scripts

· User’s Home Directory – .bash_profile, .bashrc & .bash_logout

· Shebang

· Create a simple Shell Script

· Setting up permissions on a script

· Debug a Script

The Shell Variables & Environment

· Bash Variables

· Environmental Variables

· System Variables

· Assign values to shell variables

· Customize the bash shell environments

· set, env & export command

· Rules for naming the variable name

· Simple Script using the echo command

· Quoting

· There are three Type of quoting

· The double quote

· The single quote

· The Backslash

· User’s Input via Keyboard

· Read Command


· Practice Lab Session

Arithmetic Operations

· Performing Arithmetic Operations

· Create an integer Variable

· Create the Constants Variable

· Path name expansion

· Wildcards [*], ?, [..] etc

· Create & use aliases

· Practice Lab Sessions

Industrial Project to Completely Automate the Pre-validation report

· A Shell Script to collect the required information from a server

· The Bash Color

· Writing Color Text

· Various Color Codes for Foreground & Background Text

· Lab Session on Bash Color

· Script to fetch the system information i.e system_details

· Schedule the script via cron

· Final Script to fetch the environment report with a single click

· Lab Session

Conditional Statements (Decision Making)

· Overview of conditional execution

· What is Condition?

· Boolean value (True & False)

· If else statement

· Lab Session on if..else..

· statement

· test command

· Logical AND &&

· Logical OR !!

· The exit status of a command

· Numeric Comparison

· String Comparison

· File Attributes Comparison

· Shell Command line parameters

· Positional parameters via special shell variable

· Practice Lab Session

Bash Loops

· Overview of loop statement

· for loop statement

· Lab on for loop

· for loop using C like Syntax

· for loop using command-line arguments

· Nested for loop statement

· Chessboard using a nested loop statement

· While loop statement

· Lab Session – read a text file line-by-line or using IFS

· infinite while loop

· case statement

· Lab session on case statement

· Create a simple menu-driven program or automation tool Using Case Statement

· Industrial Project

· Discussed various scripts using for or while loop

Shell Redirection & Process Management

· Input Output Redirection in Linux

· Lab Session on redirection

· Pipelines in Linux

· tee command

· file descriptor (fd) to file for output

· file descriptor (fd) to file for input

· file descriptor (fd) for reading & writing

· Practice Lab Session

· Overview of a Process

· Foreground & background Process

· Various Stats of a process

· Lab Session


· Defining functions

· Displaying functions

· Nested functions

· Lab Session – writing functions

· Calling functions

· Local & global variables

· Passing arguments into a function

· return statement

· Practice Lab Sessions


· Introduction Awk

· Pattern matching

· User-defined variables in awk

· Awk pre-processing

· Awk post-processing

· Practice Lab Session

SED Stream Editor

· Introduction

· Replacing or substituting string.

· Replacing the nth occurrence of a pattern in a line

· Replacing all the occurrence of the pattern in a line

· Changing the slash (/) delimiter

· Using & as the matched string

· Duplicating the replaced line with /p flag

· Replacing string on a specific line number

· Replacing string on a range of lines

· Replace on lines which match a pattern

· Deleting lines

· Add a line after a match

· Add a line before a match

· Last Lecture

Who this course is for:

  • Graduate Students and also those who are in a job in Linux Administration & want to get hands-on practical experience on troubleshooting.
  • IT professionals across a broad range of disciplines who need to perform essesntial administration tasks.


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