Complete Linux Guide
Master Linux fundamentals to advanced topics for DevOps engineers
Linux Fundamentals
Core concepts and basic commands
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What is Linux? History & Distributions
Understanding Linux origins and different distributions
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Understanding Kernel, Shell & Filesystem
Core components of Linux operating system
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Linux Architecture Explained
User Space vs Kernel Space architecture
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Basic Linux Commands
ls, pwd, cd, mkdir, rm, cp, mv, cat, etc.
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Working with the Command Line
CLI vs GUI and command line basics
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File Permissions and Ownership
chmod, chown, umask commands
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File Types and Links
Hard vs Soft Links and file types
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File System Hierarchy
/bin, /etc, /var, /usr, /home, /tmp directories
User and Group Management
Managing users, groups and permissions
File Operations & Text Processing
Advanced file handling and text manipulation
Process & System Management
Process control and system administration
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Understanding Processes & Jobs
Process management fundamentals
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Foreground vs Background Processes
fg, bg, jobs, kill commands
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Process Monitoring
ps, top, htop, nice, renice
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Scheduling Tasks with cron and at
Automated task scheduling
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System Startup and Runlevels
Boot process and system initialization
Package Management
Software installation and management
Networking in Linux
Network configuration and management
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Network Configuration Files
Network configuration and setup
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Network Commands
ip, ifconfig, netstat, ss, ping, traceroute
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DNS & /etc/hosts
Domain name system configuration
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Firewall Basics
ufw, iptables, firewalld configuration
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SSH, SCP, and SFTP
Remote access and secure file transfer
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Network Troubleshooting
Complete guide to Linux Network Troubleshooting
Disk Management & Storage
Storage management and disk operations
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Disks, Partitions, and Filesystems
Storage fundamentals and concepts
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Mounting and Unmounting Drives
Filesystem mounting operations
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Checking Disk Usage
df, du commands and disk monitoring
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Disk Management Tools
fdisk, lsblk, blkid for disk operations
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Swap Memory and File
Virtual memory configuration
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LVM (Logical Volume Manager) Basics
Logical volume management
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Disk Quotas
User disk space limits
Linux Security & Permissions
Advanced security and permission management
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File & Directory Permissions Deep Dive
Advanced rwx permissions and concepts
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Sticky Bit, SUID, SGID
Special permission bits and their usage
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Firewall Setup & SSH Hardening
Security hardening techniques
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Security Logs Analysis
/var/log/auth.log, /var/log/secure monitoring
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SELinux & AppArmor Basics
Mandatory access control systems
Shell Scripting
Bash scripting and automation
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Introduction to Bash Scripting
Bash scripting fundamentals and basics
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Variables, Loops, and Conditionals
Scripting control structures
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Functions & Arguments
Creating and using functions in scripts
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Error Handling in Scripts
Script error handling techniques
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Automating System Tasks
Practical automation examples
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Script Scheduling with Cron
Automating script execution
System Monitoring & Performance
Performance monitoring and optimization
Linux Services & Daemons
Service management with systemd
Advanced Topics for DevOps
DevOps-specific Linux configurations
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Environment Variables & Profiles
.bashrc, .profile, .bash_profile configuration
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SSH Keys & Key-based Authentication
Secure SSH key management
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Managing Remote Servers
Remote server administration techniques
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File Transfer Automation
rsync, scp for automated transfers
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Using screen and tmux
Terminal multiplexer tools
Linux for Containers & Cloud
Container and cloud technologies
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Namespaces & Cgroups Basics
Container isolation fundamentals
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Docker on Linux
Docker installation and basics
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Linux Networking for Containers
Container network configuration
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Systemd inside Containers
Running systemd in container environments
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Cloud CLI Tools
AWS CLI, gcloud, az command line tools
Troubleshooting & Best Practices
Problem solving and optimization
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Common Boot Issues
Troubleshooting system boot problems
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Log Analysis Techniques
Advanced log file analysis methods
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Backup & Restore Strategies
Data backup and recovery planning
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Kernel Panics & Recovery
Handling kernel crashes and recovery
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Best Practices for DevOps
Linux best practices in DevOps environments
Linux Interview & Practical Scenarios
Real-world scenarios and interview preparation