File structure in UnixLinux

Filesystem Structure in Linux2

File types in Linux

Links to Download RHELCentoS VMware Workstation Oracle VirtualBox

Linux Installation 2

Linux Installation 1

Connect from putty

Introduction to Unix

History of Linux

Overview about Course Module

Basic Commands pwd cd ls

Linux commands file man mkdir

Linux commands less date cp

Linux Commands wc dd

Linux Commands hard link soft link

Linux Commands tail touch head

Linux Commands mv cat rm rmdir

File Directory Attributes

Access Modes Absolute Symbolic Mode

Change Ownership

Overview of Permissions in Linux

Lab Session 2

Lab Session 3

Lab Session 1

Lab Session 4

Setuid Special Permissions

Lab Session 5

Sticky Bit Special Permissions

Setgid Special Permissions

Overview of User Administration

Practice Lab Session User and Group Creation

Managing User Account

Overview of shadow file

Usermod Command

Understanding Password Aging Policy

Lab on Password aging policy using Chage Command

Access Control List Concepts

Default ACL

Set ACLs on files

Lab Mask to limit the set of permissions

Practice Lab Session Set ACL on Directories

Practice Lab Session Set ACL on Files

Lab default acl

Practice Exercise on ACL

Aliases in sudoers file

Overview of sudo access

sudoers file

Practice Lab Session 2

Examples of sudo

Practice Lab Session 1

Practice Lab Session 3

Users Home Directory

bashprofile bashrc bashlogout

Practice Lab Session

How to set PATH in bashprofile file

Enviornment Variables

Bash Variables

System Variables

Standard Input Output Redirections

Scheduling a job for a specific time1

Overview about Crontab format

Scheduling a job for a specific time2

Lab session on Linux Crontab

Overview of OpenSSH

Config file sshdconf 1

Config file sshdconf 3

Config file sshdconf 2

telnet

Practice Lab Session 1

Practice Lab Session 2

Lab session on telnet configuration

Process Management

fg bg process

process stats

Practice Lab Session 1

Practice Lab Session 2

Practice Lab Session 3

Partitioning a Disk

MBR Partitioning Scheme

GPT Partitioning Scheme

Primary Extended Partitions

Creating a file system

Scan new scsi disks in Linux Virtual Machine

Managing Partitions with Parted

Introduction to RAID

SW HW Raid

RAID 0

RAID 1

RAID 6

RAID 5

RAID 10 or 01

Lab1 configure RAID 0 striping

Lab2 Configure RAID 5 Disk Striping with single distributed parity

How to recover a failed disks from RAID

Overview of LVM

LE to PE Mapping

linear logical volumes

striped logical volumes

mirrored logical volumes

Components of LVM

Lab 2 Extend a FileSystem

Lab 4 Create a striped LV

Lab 3 extend a vg and lv

Lab 6 remove a vg

Lab 5 Create a mirrored lv

Lab 7 vgexport vgimport commands

Configure Install Yum Server

Why yum was made

xmlgz files in Yum

Lab1

Client side configuration in Yum

Yum History Command

Reverting and Repeating Transactions

Firewall concepts

About nftables features and advantages of firewalld

Firewalld components predefined zones

How packet flows through firewall

Adding and Removing Services Port from Firewall Server Lab Session

Add HTTP Service in firewalld Lab Session

Add Services Permanently in Firewalld Lab Session

Check firewalld services Lab Session

Port forwarding Lab Session

About Rich Rules in Firewalld

Conceptual discussion about Masquerading Packet Flow in Firewalld

Masquerading with Port Forwarding Lab Session

Specifically allow a Server using Rich Rules Lab Session

Accept Reject Drop Lab Session

Allow Telnet Port SSH with log prefix using Rich Rule Lab Session

Overview of FTP Server

configuration file of vsftp

Practice Lab 2

Practice Lab 1 Configuring ftp server

Practice Lab Session 4

Practice Lab Session 3

OS Upgrade RHEL 71 to 72 Part 1

OS Upgrade RHEL 71 to 72 Part 2

NFS Network File Systems 2

Important Services in nfs

how nfs works

Overview about NFS Server

Configurations files

Practice Lab Session 2

Practice Lab Session 3

Practice Lab Session 1

Features of Kickstart Server

Overview of Kickstart Server

Graphical Mode to configure kickstart config file

Theoritical Steps to configure Kickstart Server

Kickstart config file 1

Lab1

Lab2

Kickstart config file 2

Lab4

Lab3

Lab6

Lab5

Introduction Apache Web Server

Basic Setup of Apache Web Server

Apache Main Conf File 2

Apache Main Configuration file 1

Order Allow Deny

Indexes

htaccess Security Restrictions on directories

Practice Lab Session on Indexes

Launching a simple web page

Practice Lab Session

Secure a Web Server

Encrypted Communication using SSL 443 port

Practice Lab Session

Overview about DNS

Understanding root top level domains hierarchy

How dns works

Practice Lab Session 2

Practice Lab Session 1

Practice Lab Session 3

Troubleshooting of dns issues

SELinux Security Concepts

SELinux Context

SELinux Modes

Lab Change context temporary

Lab SELinux

Lab SELinux Modes

Lab Change context permanently

Lab SELinux inheritance and its pitfalls

SELinux booleans

Lab SELinux booleans

How email flows from sender to receiver

Mail Service Components

mydestination parameter

mynetworks parameter

Postfix mail flow

Configure Linux Mail Server maincf

Lab on mydestination parameter

About Dovecot Imap pop3

Configuring Dovecot

Thunderbird mail user agent for accessing mails

Practice Lab Session

Overview of Samba Server

Lab Installation Configuration of Samba Server

How Samba Works

Lab Configure a Private Samba Share

Lab mount samba share on Linux Client

Lab mount samba share on windows client

Lab configure a public samba share

Lab Drive mapping on windows client

Lab Secure Samba share resources

Linux Physical Security

Securing the grub menu

How to break root password

Reset root password from rescue mode

BIOS Protection

Keep your system updated

General Security

Turn off IPv6

Disable USB Stick to detect

Check Password Expiration of a User

Restrict Users to Use Old Passwords

Verify accounts for empty password

Password Expiration Lab Session

Review logs regularly

Verify accounts with Zero UID

Keep boot as read only

Linux Network Configuration

Routing Table

Lab 2 Routing Table

Lab 1 Routing Table

Networking Configuration in Red Hat Linux 7

Basic find commands for finding files

Lab1

Lab2

Lab3

Lab4

Lab5

Introduction about Linux Performance Monitoring

CPU Context Switch

CPU run queueutilization load average

Disk IO Operations in Linux Servers

Memory Swap Management in Linux

Unerstanding Network monitoring

vmstat command 1

top command 1

top command 2

vmstat command 2

Practice Lab Session 1

Practice Lab Session 2

About Kernel Modules

Linux Booting Process

Runlevels in Booting Process

Lab on Basic System Recovery Initramfs file missingCorrupted

Lab on Basic System Recovery Grub related issues 1

Lab on Basic System Recovery Grub related issues 2

Lab on MBR corruption Stage 1 Grub basic System Recovery

Lab on MBR Corruption Part 2

Lab on Basic System Recovery Critical files are missing like mount binary etc

Basic System Recovery Critical files are missing like mount binary

Overview features of Red Hat Linux 7

Features of systemd 1

RHEL7 vs RHEL6 Part1

Features of Systemd 2

RHEL7 vs RHEL6 Part3

RHEL7 vs RHEL6 Part2

Practice Lab Session 1

Practice Lab Session 2

Practice Lab Session 3

Emergency Mode in RHEL 7

Rescue Mode in RHEL 7

Lab session on booting into Rescue Mode

Lab session on booting into Emergency Mode

Troubleshooting mode

Resetting the root passwd

mbr is corrupted

fstab file missing or bad entry

grub conf is missing

initramfs file is missing

Overview of Grub2

Grub Configuration file

Features of grub2

Boot from grub command prompt Lab 1

Boot from grub command prompt Lab 2

Modify grub configuration file Lab 3

How to set a password at grub

Overview of Red hat Satellite Server 62

Prerequisites for Satellite Server

Installing Satellite using offline repo

Configuring Satellite Server

Subscription with Red Hat Network

Registering the Satellite Server in RHN

Create Repos

Downloading Uploading manifest

Activation key registering the client with Satellite Server

Lab

Kdump Configuration in RHEL 7

Types of backup

Overview of Backup

Dump command

Practice Lab Session 2

Practice Lab Session

dig command

traceroute command

rsync command

ssh scp sftp command

find grep locate command

ps top who commands

cut sort commands

vim command

df du lsof commands

sed awk command

tar gzip bzip2 commands

usermod groupadd groupdel

chage chroot chown commands

useradd userdel commands

uptime free uname commands

mount umount fdisk mkfs commands

proc command

systemd commands

LVM Commands

What is Linux Shell

Types of shells available in Linux

Overview of Bash Shell

About Shell Scripting

bashprofile bashrc bashlogout

Practice Lab Session 2

Practice Lab Session 1

Create a simple shell script

Debug a script

Bash Variables

Environmental Variables

System Variables

Practice Lab Session

Script to collect system information using echo command only

Quoting and their types

The Backslash

read command

Getting User Input Via Keyboard

Use of IFS

Performing Arithmetic Operations

Create an Integer Variable

Create the Constants Variable

Path name expansions

Wildcards

Aliases

Overview of the Industrial Project

Bash Colors

Lab Session on bash colors

Create an Automation Script 3

Create an Automation Script 1

Create an Automation Script 2

Create an Automation Script 4

Overview of conditional execution

if else statement syntax

Lab Session on ifelse

test command

Lab Session on ifelifelsestatements

Lab session on test conditions 1

Lab session on test conditions 2

exit status of a command

Lab on exit status 1

Lab on exit status 2

Numeric String comparison

command line arguments

positional parameters via special shell variable 1 2 39

File attributes comparison

for loop statement

Lab Session on for loop

Conceptual understanding of for loop

for loop reading from a text file

for loop using C like syntax

for loop using commandline arguments

Chessboard using nested loop statement

Lab Session read a text file linebyline or using IFS

infinite while loop

While loop statement

Case Statement

Automation Tool Using Case Statement 1

Automation Tool Using Case Statement 2

Input Output Redirection in Linux

Lab Session on redirection

tee command

Pipelines in Linux

file descriptor fd to file for output

file descriptor fd for reading writing

file descriptor fd to file for input

Defining functions

Displaying functions

Nested functions

Lab Session Writing Functions

Local Global Variables

return statement

Practice Lab Session

Introduction AWK

Pattern matching using awk

Awk preprocessing

Awk postprocessing

About Sed

Replacing or substituting string

Replacing string on a specific line number or matches a pattern

Delete or add a line after or before a match

Last Lecture

Changing the slash delimiter