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What is Linux?
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What is Linux?
Linux is an open-source operating system kernel first released by Linus Torvalds in 1991. It is the foundation of many operating systems (distributions) used in servers, desktops, mobile devices, and embedded systems worldwide.
Key Characteristics
- Open Source - Free to use, modify, and distribute
- Multi-user - Supports multiple users simultaneously
- Multi-tasking - Runs multiple processes concurrently
- Secure - Strong permissions and access control model
- Stable - Known for uptime and reliability
- Portable - Runs on many hardware architectures
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What is Oracle Virtual Box?
Downloading and Installing Oracle Virtual Box
Creating Virtual Machine
Linux Distributions
Different Ways to Install Linux
Downloading and Installing Linux (CentOS)
Redhat Linux Installation (Optional)
Linux Desktop (GUI)
Virtual Machine Management
Linux vs. Windows
Who Uses Linux?
Quiz, Homework and Handouts
Accessing Linux System
Download and Install Putty
Connect Linux VM via Putty
Important Things to Remember in Linux
Introduction to File System
File System Structure Description
File System Navigation Commands
File System Paths
Directory Listing Overview
Creating Files and Directories
Finding Files and Directories (find, locate)
Changing Password
Wildcards
Combining and Cutting Files (cat and cut)
Soft and Hard Links (ln)
Quiz, Homework and Handouts
Commands Syntax
File Permissions (chmod)
File Ownership (chown, chgrp)
Getting Help (man, whatis etc.)
TAB Completion and Up Arrow Keys
Adding Text to File
Pipes
File Maintenance Commands
File Display Commands
Filters / Text Processing Commands
Compare Files (diff, cmp)
Compress and Un-compress Files (tar, gzip, gunzip)
Combining and Splitting Files
Linux vs. Windows Commands
Quiz, Homework and Handouts
Linux File Editors (vi Text Editor)
sed Command
User Account Management
Switch Users and Sudo Access
Monitor Users
Talking to Users (users, wall, write)
Linux Directory Service - Account Authentication
Difference between AD, LDAP, IDM, WinBIND, OpenLDAP
System Utility Commands
Processes and Schedules (systemctl, ps, top, kill, crontab, at)
Process Management
System Monitoring Commands
OS Maintenance Commands
Changing System Hostname (hostnamectl)
Finding System Information
System Architecture (arch)
Terminal Control Keys
Terminal Commands (clear, exit, script)
Recover Root Password (Single User Mode)
SOS Report
Quiz, Homework and Handouts
Linux Kernel
What is a Shell?
Types of Shells
Shell Scripting
Basic Shell Scripts
If-Then Scripts
For Loop Scripts
Do-While Scripts
Case Statement Scripts
Aliases
Shell History
System Run Levels
Linux Boot Process
Message of the Day
Disk Partition (df, fdisk, etc.)
Storage
Logical Volume Management (LVM)
LVM Configuration During Installation
Add Disk and Create Standard Partition
Add Disk and Create LVM Partition
Extend Disk Using LVM
Adding Swap Space
RAID
Quiz, Homework and Handouts
Resume Workshop
Cover Letter
Linux Job Description or Duties
Exposure to Other Technologies
Homework and Handouts
IT Components
IT Job Statistics
Linux Around Us
Linux Operating System Jobs
IT Management Jobs
Post Resume and What to Expect
Interview Workshop
Red Hat Certifications (RHCSA, RHCE etc.)
Join Linux Community
200+ Interview Questions
Homework
Commands We Have Learned
Don't Give Up
Congratulations
Recap
Extra Lectures and Resources