User Guide - Logicrays
Git Knowledge
Git: First Time Configuration
Checking Your Settings
View All Current Git Settings
View Specific Configuration Level
Configuring Your Identity
Set Username and Email (Repository Level)
Set Username and Email (Global Level)
Verify Your Identity Configuration
Configuring Your Editor
Set Vim as Default Editor
Set VS Code as Default Editor
Set Nano as Default Editor
Set Sublime Text as Default Editor
Set Other Editors
Configuring Color Output
Configuring Default Branch Name
Configuring Line Endings
For Windows
For macOS/Linux
Configuring Credential Storage
Cache Credentials (Temporary)
Store Credentials Permanently
Configuring Merge Strategy
Configuring Push Behavior
Enable AutoCorrect
Disable AutoCorrect
Creating Git Aliases
Basic Aliases
Advanced Aliases
Additional Useful Configurations
Show Branch in Terminal Prompt
Configure Diff Tool
Configure Merge Tool
Enable Reuse Recorded Resolution
Set Commit Template
Ignore File Permissions Changes
Configure Pager
Getting Help
View Command Help
Examples
Quick Option Reference
Complete Setup Script
Viewing and Editing Configuration
View Configuration File
Remove Configuration
Reset Configuration
Verifying Your Setup
Best Practices
Troubleshooting
Configuration Not Working
Wrong Editor Opening
Commits Showing Wrong Author
Git: Display Branch Name in Terminal
Configuration Steps
Result
Git: Branch Divergence Guide
Overview
What is Git Branch Divergence?
Key Causes of Divergence
How Git Shows Divergence
Using git status
Using git log
Branch Divergence Scenarios
1️⃣ When Local and Remote Branches Are in Sync
2️⃣ When Local is Ahead of Remote
3️⃣ When Local is Behind Remote
4️⃣ When Local and Remote Have Diverged
5️⃣ Detached HEAD (No Branch)
Resolving Branch Divergence
Strategy 1: Merge (Preserves History)
Strategy 2: Rebase (Linear History)
Strategy 3: Force Push (Dangerous)
Resolving Conflicts
During Merge
During Rebase
Visualizing Divergence
Custom Git Alias
Preventing Branch Divergence
Standard Git Workflow
Best Practices
Troubleshooting Common Issues
Issue 1: Can’t Push Due to Divergence
Issue 2: Accidentally Worked on Wrong Branch
Issue 3: Merge Conflicts Too Complex
Issue 4: Lost Commits After Rebase
Configuration Tips
Configure Pull Behavior
Configure Push Behavior
Summary
Key Takeaways
Quick Reference Commands
See Also
Git: Commit Messages Guide
Overview
Reference Documentation
Normal Git Commit Messages
Example
Characteristics
Pros
Cons
Formatted Git Commit Messages (Conventional Commits)
Commit Message Format Structure
Syntax
Rules
Header Structure
Type
Scope
Subject
Body
Footer
Commit Types
Examples
Type 1: feat - A New Feature
Type 2: fix - A Bug Fix
Type 3: docs - Documentation Only Changes
Type 4: style - Code Formatting Changes
Type 5: refactor - Code Refactoring
Type 6: perf - Performance Improvements
Type 7: test - Adding Tests
Type 8: chore - Build Process and Tools
Writing Commit Messages
Step-by-Step Process
Quick Commit (One-Liner)
Multi-Line Commit Message
Best Practices
Do’s
Don’ts
Comparison: Normal vs Formatted Commits
Normal Commits Pros
Normal Commits Cons
Formatted Commits Pros
Formatted Commits Cons
Automation Tools
Example Tools
See Also
Git: Commands Reference Guide
Overview
Git Basics
Initialize Repository
Clone Repository
Configuration
Working with Files
Stage Changes
Commit Changes
Check Status
View Differences
View History
Branching
List Branches
Create Branch
Switch Branch
Rename Branch
Delete Branch
Merging
Remote Repositories
Manage Remotes
Fetch
Pull
Push
Undoing Changes
Reset
Revert
Clean
Restore
Rewriting History
Amend
Rebase
Rebase Operations
Reflog
Stashing
Tags
Useful Commands
Show Information
Search
Bisect
Cherry-Pick
Submodules
Advanced Operations
Worktree
Patch
Archive
Common Workflows
Feature Branch Workflow
Initial Setup Workflow
Updating from Remote
Quick Reference
Essential Commands
Useful Aliases
See Also
Git: GitHub Releases Guide
Overview
Prerequisites
GitHub Release Workflow
Step 1: Initialize Repository
Step 2: Create GitHub Repository
Step 3: Link Local Repository to GitHub
Step 4: Push Code to GitHub
Step 5: Create and Push Tag
Option A: Lightweight Tag
Option B: Annotated Tag (Recommended)
Option C: Multi-line Tag Message
Complete Release Workflow Example
Managing Tags
List Tags
View Tag Information
Delete Tags
Tag Specific Commits
Creating GitHub Releases
API Method
Semantic Versioning
Pre-release Versions
Best Practices
Tagging Best Practices
Release Workflow Best Practices
Common Workflows
Feature Release Workflow
Hotfix Release Workflow
Troubleshooting
Tag Not Appearing on GitHub
Cannot Push Tag
Tag Already Exists
See Also
Git: Project Setup
Git Setup Script
Quick Example
Manual Setup Using GIT Commands
Git: SSH Key Generation and Setup
Why Use SSH Keys?
Prerequisites
Generating SSH Keys
Step 1: Navigate to Your Working Directory
Step 2: Generate ED25519 SSH Key
Understanding SSH Key Naming
Choosing a Key Filename
Common Naming Patterns
Recommended Naming Strategy
Quick Reference: Placeholder vs Actual Examples
Complete Key Generation Example with Custom Name
Real-World Example: Multiple Keys Setup
Alternative: Generate RSA SSH Key
Key Generation Output
Understanding the Key Pair
Moving Keys to SSH Directory
Step 1: Create SSH Directory
Step 2: Move Keys to SSH Directory
Step 3: Set Proper Permissions
Adding Key to SSH Agent
Step 1: Start SSH Agent
Step 2: Add Key to Agent
Step 3: Verify Key is Loaded
Additional SSH Agent Commands
Adding Public Key to GitHub
Step 1: Copy Public Key to Clipboard
Step 2: Add Key to GitHub
Step 3: Test GitHub Connection
Adding Public Key to GitLab
Step 1: Copy Public Key
Step 2: Add Key to GitLab
Step 3: Test GitLab Connection
Adding Public Key to Bitbucket
Step 1: Copy Public Key
Step 2: Add Key to Bitbucket
Step 3: Test Bitbucket Connection
Using SSH Keys with Git
Clone Repository with SSH
Change Existing Repository to SSH
Managing Multiple SSH Keys
Create SSH Config File
Add Configuration for Each Service
Using Different Keys
Set Proper Permissions on Config
Security Best Practices
Troubleshooting
Permission Denied (publickey)
Bad Permissions
Could Not Open a Connection to Your Authentication Agent
Wrong Key Being Used
Host Key Verification Failed
Key Not Loading on System Restart
Frequently Asked Questions (FAQ)
Does ssh-keygen generate both public and private keys?
Which key do I upload to GitHub/GitLab?
What happens to the private key?
Do I need both files for SSH to work?
Can I regenerate the public key from the private key?
How many key pairs can I have?
Listing All SSH Keys
List All Keys in SSH Directory
View Public Key Content
View Key Fingerprint
List Keys on GitHub
Removing SSH Keys
Remove Key from SSH Agent
Delete Key Files
Remove Key from GitHub
Quick Reference Commands
Additional Resources
Official Documentation
Key Management Tools
Best Practices Summary
Git: Stash Guide
What Gets Stashed?
Stashing Changes
Basic Stash Commands
Stashing Untracked Files
Stashing All Files (Including Ignored)
Viewing Stashes
List All Stashes
Show Latest Stash
Show Specific Stash
Re-applying Stashed Changes
Git Stash Pop
Git Stash Apply
Deleting Stashes
Drop a Single Stash
Clear All Stashes
Creating a Branch from Stash
Advanced Usage
Stash with Patch Mode
Stash Specific Files
Stash with Keep Index
View Stash as Diff
Common Workflows
Quick Reference Cheat Sheet
Stashing Commands
Viewing Commands
Applying Commands
Deleting Commands
Branch Commands
Best Practices
Troubleshooting
Stash Pop Conflicts
Lost Stash Recovery
Git: Fix Line Ending Issues (CRLF/LF)
Understanding the Problem
Detect Line Ending Issues
Check What Git Sees
Verify Line Endings in Files
Fix Line Ending Issues
Option 1: Convert Local File to CRLF
Option 2: Convert Local File to LF
Verify the Fix
Prevent Future Issues
Use .gitattributes
Configure Git Settings
Real-World Examples
When to Convert: Decision Guide
Example 1: Converting Local File to CRLF
Example 2: Converting Local File to LF
Quick Reference
Common Scenarios
Scenario 1: Cloned Repository on Different OS
Scenario 2: Multiple Developers on Different OS
Best Practices
Troubleshooting
Issue: Normalization Doesn’t Work
Issue: Files Keep Showing as Modified
References
Technical Guides
Compare MySQL Database Schema
Overview
What is mysql-schema-diff?
Key Features
Installation
Command Options
Usage Syntax
General Options
Connection Options
Database-Specific Connection Options
Usage
Basic Syntax
Usage Examples
Output Example
How It Works (Internals)
Process Flow
Use Cases
htaccess Password Protect URL
Creating Hash Password
Steps to Create Password Protection
Understanding the .htaccess Configuration
Sphinx & Read the Docs Guide
Introduction
Reference Links
Prerequisites
System Requirements
1. Install Sphinx
2. Install pip (Python Package Manager)
3. Install VS Code Extensions (Optional)
4. Install Sphinx Extensions
Quick Start Guide
Step 1: Create a GitHub Repository
Step 2: Initialize Local Git Repository
Step 3: Create Documentation Directory
Step 4: Run Sphinx Quick Start
Step 5: Verify Directory Structure
Building Your Documentation
Build HTML Output
Build Other Formats
Preview Documentation Locally
Sphinx Configuration
Change Theme
Configure Extensions
Advanced Configuration Options
Preparing for Read the Docs Deployment
Step 1: Create .readthedocs.yaml Configuration
Step 2: Create Requirements File
Advanced: Organized Requirements Files
Step 3: Configure Git Ignore
Step 4: Commit and Push to GitHub
Deploying to Read the Docs
Step 1: Create Read the Docs Account
Step 2: Import Your Project
Step 3: Configure Project Settings
Step 4: Build Documentation
Step 5: View Your Documentation
Advanced: Using Sphinx Code Tabs
Installation
Configuration
Basic Usage
Advanced Features
Troubleshooting
Common Build Errors
Performance Issues
Getting Help
Conclusion
Visual Studio Code Configuration Guide
Introduction
What is Visual Studio Code?
Installation
Download and Install
Verify Installation
PHP Code Sniffer Configuration for Magento 2
Understanding Code Sniffers
Prerequisites
Install Magento Coding Standard
Configure phpcs in VS Code
Verify phpcs is Working
Manual phpcs Commands
Essential VS Code Extensions
How to Install Extensions
PHP Development Extensions
Magento Development Extensions
Version Control Extensions
HTML/CSS/JavaScript Extensions
Productivity Extensions
AI-Powered Extensions
Remote Development Extensions
Utility Extensions
Configuration Extensions
Container & DevOps Extensions
Database Extensions
Theme Extensions
Performance Optimization
Fixing VS Code Freeze or Hang Issues
Solution 1: Exclude Large Directories
Solution 2: Disable Git Auto Refresh
Solution 3: Disable Hardware Acceleration
Solution 4: Increase File Size Limits
Solution 5: Disable Unused Extensions
setting.json File Example
Custom Code Snippets
How to Create PHP Snippets
Snippet Variables
Essential Keyboard Shortcuts
General Shortcuts
Editing Shortcuts
Code Navigation
Search and Replace
Tips and Best Practices
Workspace vs User Settings
Increase Productivity
Debugging PHP in VS Code
Conclusion
Xdebug in VS Code for PHP
Prerequisites
Official Documentation
Check Xdebug Installation Status
Install Xdebug
Install PHP Debug Extension in VS Code
Configure Xdebug
Create launch.json Configuration File
Understanding pathMappings
Example launch.json Configuration
Start/Stop Debugging in VS Code
Example: Debugging Customer Login Process
Understanding Debug Controls
Step Into (F11)
Step Over (F10)
Step Out (Shift+F11)
Additional Resources
Demo Video
YouTube Tutorials
Magento 2 Guides
Magento 2: Installation Guide
Overview
System Requirements
Minimum Requirements
Hardware Recommendations
Prerequisites Installation
Quick Summary
Required PHP Extensions
Configure PHP for Magento
Create Database
Installation Methods
Method 1: Install via Composer (Recommended)
Method 2: Install from Archive
Configure Apache Virtual Host
Create Virtual Host Configuration
Enable Site and Modules
Update Hosts File
Post-Installation Configuration
Common Post-Installation Steps
Deploy Static Content
Set Magento Mode
Configure Cron
Configure Redis (Optional)
Configure Two-Factor Authentication
Verification
Check Installation
Performance Optimization
Enable Flat Catalog
Configure Full Page Cache
Production Mode Optimization
Troubleshooting
Common Issues
Maintenance Commands
Update Magento
Backup Database
Clear Cache
Reindex Data
Security Best Practices
Quick Reference
Essential Commands
Installation Checklist
See Also
Prerequisites
Magento Related
External References
Magento 2: Module Installation
Overview
Installation Methods
Method 1: Composer Installation
Method 2: Manual Installation
Method 3: Marketplace Installation
Method 4: Git Submodule Installation
Module Management Commands
Essential CLI Commands
Setup Commands
Module Dependencies
Checking Dependencies
Module Load Order
Troubleshooting
Common Issues
Module Conflicts
Best Practices
Installation Best Practices
Development Mode vs Production Mode
Version Control
Module Update Process
Updating via Composer
Manual Update
Security Considerations
Module Verification
Quick Reference
Complete Installation Sequence
Common Commands Summary
See Also
Magento 2: n98-magerun2 Tool
Overview
What is n98-magerun2.phar?
Source & Documentation
Installation
Create Alias (Optional)
Available Commands
Core Commands
Admin Commands
Cache Commands
CMS Commands
Configuration Commands
Customer Commands
Database Commands
Design Commands
Development Commands
EAV Commands
Generation Commands
GitHub Commands
Index Commands
Integration Commands
Media Commands
Route Commands
Sales Commands
Script Commands
Search Commands
System Commands
Common Usage Examples
Admin User Management
Database Operations
Cache Management
Configuration
Customer Management
Development Tools
System Information
Best Practices
See Also
Magento 2: RabbitMQ Message Queue
Overview
Installation Sequence
Code Structure
Connection Adapters
Database Adapter
AMQP Adapter
Message Queue Framework Architecture
Components
Message Queue Status
Status Management
Install RabbitMQ Server
Enable RabbitMQ Management Dashboard
Configure RabbitMQ
Create User with Permissions
Create Queue
Access Management Dashboard
Login Credentials
Magento 2 configuration
Connect RabbitMQ to Magento Open Source or Adobe Commerce
RabbitMQ Example
Basic Information about RabbitMQ files
communication.xml
queue_publisher.xml
queue_topology.xml
queue_consumer.xml
Create Publisher Class
How to consume message in queue
Conversion of Magento 2 Queue from MySQL to AMQP
Conclusion
Magento 2: NPM Package Integration
Overview
Installation Steps
Usage Example
Result
Benefits
Magento 2: MFTF Testing Framework
Overview
What is MFTF?
Key Features
MFTF Tests Location
Directory Structure
Prerequisites
Prepare Environment
System Requirements
Required PHP Extensions
Installation
Step 1: Install MFTF
Install Composer
Install Java
Install ChromeDriver
Download Selenium Server
Directory Structure After Installation
Find your MFTF Version
Using MFTF CLI
Using Composer CLI
Configuration
WYSIWYG Admin Configuration
Change Security Settings
Check MFTF Health
Generate Configuration File
Configure Environment
Steps For The Running MFTF Test
Configure Credentials
MFTF Project Structure
Directory Layout
Test Components
Workflow MFTF
Test
Page
Section
ActionGroup
Data
MetaData
Building Tests
Generate Test Files
Clean Generated Tests
Running Tests
Run All Tests
Run Specific Tests
Run Tests in Parallel
Debug Mode
Creating Custom Tests
Example 1: Simple Login Test
Example 2: Product Creation Test
Creating Action Groups
Creating Page Objects
Creating Sections
Creating Data Entities
Test Annotations
Common Annotations
MFTF Actions
Common Actions
Advanced Actions
Best Practices
Test Organization
Test Data Management
Performance Optimization
Debugging Tests
Enable Debug Mode
View Test Output
Screenshots and Logs
Common Issues
CI/CD Integration
GitLab CI Example
GitHub Actions Example
Quick Reference
Essential Commands
Test Structure Template
See Also
Linux Guides
Apache Virtual Host Configuration Guide
Introduction
What is a Virtual Host?
Prerequisites
Understanding Apache Directory Structure
Basic Virtual Host Configuration
Method 1: Standard Virtual Host File
Method 2: Include Configuration from Project Directory
Magento-Specific Virtual Host Configuration
Step 1: Create Virtual Host Configuration
Step 2: Add Magento Virtual Host Configuration
Step 3: Include Configuration in Apache
Step 4: Enable Required Apache Modules
Step 5: Verify Configuration
Step 6: Fix Magento HTTPS Issues (Optional)
SSL/HTTPS Virtual Host Configuration (Optional)
Configuring HTTPS with Let’s Encrypt
Manual SSL Virtual Host Configuration
HTTP to HTTPS Redirect
Common Apache Commands
Managing Virtual Hosts
Managing Apache Modules
Apache Service Management
Testing and Validation
Troubleshooting
Common Issues and Solutions
Viewing Logs
Performance Optimization
Enable Compression
Enable Caching
Security Best Practices
Disable Directory Listing
Hide Apache Version
Limit Request Size
Conclusion
Bash Scripts for Service Management
Overview
Prerequisites
Script 1: Stop Web Services
Create the Script
Add Script Content
Make Executable
Install Globally
Usage
Script 2: Start Web Services
Create the Script
Add Script Content
Make Executable and Install
Usage
Script 3: Start Docker Services
Create the Script
Add Script Content
Make Executable and Install
Usage
Script 4: Stop Docker Services
Create the Script
Add Script Content
Make Executable and Install
Usage
Script 5: Git Repository Setup
Create the Script
Add Script Content
Make Executable
Usage
Features
What the Script Does
Verify Installation
Script 6: Automated PHP Version Switching
Create the Script
Add Script Content
Make Executable and Install
Usage
Features
Script 7: System Information Checker
Create the Script
Add Script Content
Make Executable and Install
Usage
Features
Available Information Categories
Saving System Reports
Managing Custom Scripts
List Installed Scripts
View Script Content
Edit Installed Script
Remove Script
Check Service Status
Best Practices
Script Development
Service Management
Security Considerations
Documentation
Troubleshooting
Script Permission Denied
Command Not Found
Service Fails to Start/Stop
Script Runs But Services Not Affected
Git Setup Issues
PHP Switching Issues
Quick Reference
Conclusion
Key Benefits
Next Steps
Best Practices Summary
Related Resources
LAMP Stack Installation Guide
Introduction
What is LAMP Stack?
Prerequisites
Apache Web Server Installation
Update System Packages
Install Apache
Verify Apache Installation
Configure UFW Firewall (Remote Servers)
Enable Apache Modules
Manage Apache Service
Set Directory Permissions
Troubleshooting Apache
Configuration Test
Fix 404 Not Found Errors
Fix 403 Forbidden Errors
Configure ServerName
MySQL Database Installation
Install MySQL Server
Verify MySQL Installation
Configure MySQL Root Password
Create Database
MySQL Security Configuration
Create Database User with Privileges
Manage MySQL Service
Useful MySQL Commands
PHP Installation and Configuration
Update System Packages
Install Required Dependencies
Add Ondrej PPA Repository
Install PHP
Install PHP Extensions
Configure PHP Settings
Switch Between PHP Versions
Verify PHP Installation
PHP-FPM Configuration (Optional)
Understanding PHP Execution Methods
What is PHP-FPM?
Install and Configure PHP-FPM
Manage PHP-FPM Service
Configure PHP-FPM Pool
Virtual Host Configuration for PHP-FPM
Run Multiple PHP Versions with PHP-FPM
Troubleshooting PHP
Module Does Not Exist Error
Apache Not Executing PHP Files
Elasticsearch Installation
Install Java (OpenJDK)
Install cURL
Import Elasticsearch GPG Key
Add Elasticsearch Repository
Install Elasticsearch
Enable and Start Elasticsearch
Configure Elasticsearch
Configuration Files Location
Edit Main Configuration
Configure JVM Memory Settings
Increase Startup Timeout
Verify Elasticsearch
Manage Elasticsearch Service
Composer Installation
Download Composer Installer
Install Composer Globally
Verify Composer Installation
Manage Composer Versions
Clear Composer Cache
Health Check
Complete Stack Verification
Apache Status
MySQL Status
PHP Version
Elasticsearch Status
Composer Version
Create PHP Info Page
Performance Optimization
Apache Optimization
MySQL Optimization
PHP Optimization
Security Best Practices
Apache Security
MySQL Security
PHP Security
Elasticsearch Security
Additional Resources
Official Documentation
Tutorial References
Community Support
Quick Command Reference
Apache Commands
MySQL Commands
PHP Commands
PHP-FPM Commands
Elasticsearch Commands
Composer Commands
File Permissions
Log File Locations
System Monitoring
Backup and Maintenance
Database Backup
Website Backup
Automated Backups with Cron
System Updates
Restore from Backup
Conclusion
Linux Alias Configuration
What is an Alias?
Setting Up Aliases
Configuration Steps
System Management Aliases
Update System
Clean System
Install DEB Package
Magento Development Aliases
Magento Command Shortcut
Basic Magento Cleanup
Full Magento Cleanup
Check Magento Versions
n98-magerun2 Tool
Git Aliases
Count Git Commits
Common Useful Aliases
Navigation Shortcuts
List Files with Details
Disk Usage
Search History
Process Management
Safety Aliases
Web Development Aliases
Apache Management
MySQL Management
Docker Aliases
Network Aliases
Check Public IP
Ping Google
Network Connections
Complete Alias Setup Script
Managing Aliases
List All Aliases
View Specific Alias
Remove Temporary Alias
Remove Permanent Alias
Alias Best Practices
Advanced: Creating Functions
Extract Archives
Make Directory and Navigate
Find and Kill Process
Troubleshooting
Alias Not Working
Alias Not Persisting
Conflict with Existing Command
Quick Reference
Conclusion
Linux: Boot Speed Optimization Guide
Overview
What is Boot Optimization?
Why Optimize Boot Time?
Understanding Boot Process
Boot Stages
Analyzing Boot Performance
Check Boot Time
Identify Slow Services
Generate Boot Timeline
Safe Boot Optimizations
Critical Fix: fstrim Service
Fix plocate Database Updates
Disable NetworkManager-wait-online
Optional Service Optimizations
Optimize Development Services
Manage Snap Services
Optimize Docker
Performance Enhancement Tools
Install Preload
Install TLP (Laptops)
Install apt-fast
Manual Step-by-Step Guide
Step 1: Analyze Current Boot Time
Step 2: Fix fstrim Service
Step 3: Optimize plocate
Step 4: Disable Network Wait
Step 5: Reboot and Verify
Monitoring and Maintenance
Regular Boot Time Checks
Compare Boot Times
Troubleshooting
Common Issues
Rollback Optimizations
Best Practices
Do’s
Don’ts
Security Considerations
Expected Results
Benchmark Comparison
Service-by-Service Savings
Resources
Official Documentation
Useful Tutorials
Related Guides
Quick Reference
Essential Commands
Conclusion
Linux: Commands Reference Guide
File System Navigation
pwd (Print Working Directory)
ls (List Directory Contents)
cd (Change Directory)
tree
File Operations
cp (Copy)
mv (Move)
rm (Remove)
mkdir (Make Directory)
touch
File Viewing and Editing
cat (Concatenate)
less
head
tail
Text Processing
grep (Global Regular Expression Print)
sed (Stream Editor)
Compression and Archives
tar
gzip
zip/unzip
System Information
uname
top
htop
df (Disk Free)
du (Disk Usage)
free
Search and Find
find
Permissions
chown (Change Owner)
chmod (Change Mode)
Networking
ping
curl
wget
ssh (Secure Shell)
scp (Secure Copy)
Process Management
nohup
Package Management
dpkg
snap
systemctl
Database Operations
Create Database
Import Database
Export Database
Remove Definer
Additional Examples
Create .tar File
Extract .tar File
Create .zip File
Extract .zip File
SCP File Transfer
Quick Reference
See Also
Linux: Package Management Guide
Introduction
What is Package Management?
APT Package Manager
Prerequisites
Understanding APT Commands
APT vs APT-GET
Updating Package Database
Update Package Index
Upgrade Packages
Installing Packages
Install Single Package
Install Multiple Packages
Install Specific Version
Install Without Recommendations
Reinstall Package
Install Local DEB Package
Removing Packages
Remove Package (Keep Configuration)
Purge Package (Remove Everything)
Remove Unused Dependencies
Searching and Listing Packages
Search for Packages
List Installed Packages
List Available Packages
List Upgradeable Packages
Package Information
Show Package Details
Show Package Dependencies
Show Reverse Dependencies
List Package Files
Find Which Package Provides a File
Advanced Package Management
Hold Package Version
Download Package Without Installing
Simulate Package Operations
Check for Broken Dependencies
Reconfigure Package
Repository Management
List Repositories
Add PPA Repository
Remove PPA Repository
Add GPG Key for Repository
Cleaning and Maintenance
Clean Package Cache
Check Disk Usage
Remove Unnecessary Packages
Troubleshooting
Fix Broken Packages
Lock File Issues
Hash Sum Mismatch
Repository GPG Errors
Unable to Locate Package
Unmet Dependencies
Package Manager Best Practices
Regular Maintenance
Security Updates
Backup Package List
Safe Upgrade Practices
Quick Command Reference
Essential Commands
Complete Command List
APT Configuration Files
Important Files and Directories
Customize APT Behavior
Alternative Package Managers
Snap Packages
Flatpak Packages
AppImage
Common Use Cases
Development Environment Setup
Web Server Setup
Media Production Setup
Conclusion
Additional Resources
Official Documentation
Useful Tools
Community Support
Linux: Snap Package Management
What is Snap?
Benefits of Snap
Installing Snap on Linux Mint
Step 1: Remove nosnap.pref File
Step 2: Update Package Database
Step 3: Install snapd
Step 4: Verify Installation
Troubleshooting Installation
Installing Snap on Other Linux Distributions
Ubuntu
Debian
Fedora
Arch Linux
Installing Applications with Snap
Basic Installation Syntax
Common Applications
Installing with Different Confinement Modes
Snap Commands Reference
Checking Version
Searching for Packages
Listing Installed Snaps
Installing Packages
Updating Packages
Removing Packages
Reverting to Previous Version
Managing Snap Services
Viewing Snap Information
Cleaning Up Old Snap Revisions
Understanding Snap Revisions
Manual Cleanup
Automated Cleanup Script
Script Explanation
Schedule Automatic Cleanup
Advanced Snap Management
Snap Configuration
Snap Connections
Snap Aliases
Controlling Snap Updates
Checking Disk Usage
Best Practices
Troubleshooting
Snap Not Found
Permission Denied
Application Won’t Start
Disk Space Issues
Update Failed
Quick Reference
Common Applications to Install
Conclusion
Linux: System Information Commands
Overview
Why Check System Information?
Basic System Information Commands
General System Information
Operating System Information
Architecture Information
CPU Information
Display CPU Details
Memory Information
Display Memory Usage
Memory Hardware Information
Disk and Storage Information
Disk Usage Commands
Partition Information
Disk Block Devices
Hardware Information
PCI Devices
USB Devices
All Hardware Information
System Status and Monitoring
System Uptime
Date and Time
User Information
Process Information
View Running Processes
Network Information
Network Interfaces
Network Connections
Routing Information
Kernel and Module Information
Kernel Information
Kernel Modules
Kernel Messages
System Logs
View System Logs
Environment and Configuration
Environment Variables
System Configuration Files
System Information Script
Interactive System Information Tool
Quick Example
Quick Reference
Essential Commands
Common Use Cases
Server Inventory
Performance Monitoring
Troubleshooting
Resources
Official Documentation
Useful Tutorials
Related Guides
Best Practices
Regular Monitoring
Security Considerations
Conclusion
Linux: Mailpit: Email Testing Tool for Developers
Overview
What is Mailpit?
Key Features
Installation
Prerequisites
Install Mailpit Binary
PHP Configuration
Configure php.ini Files
Creating Mailpit Service
Prepare Service Configuration
Create Mailpit Systemd Service
Service Management
Managing Mailpit Service
Service Status Commands
Using Mailpit
Accessing the Web Interface
Testing Email with PHP
Testing with Magento 2
Viewing Captured Emails
Updating Mailpit
Keeping Mailpit Up to Date
Handling Update Errors
Troubleshooting
Common Issues
Best Practices
Development Environment
Testing Workflow
Integration Testing
Security Considerations
Search Filters
Common Search Filters
Resources
Official Documentation
Related Guides
Quick Reference
Conclusion
Linux: Nano Text Editor Guide
Introduction
Installation
Install on Debian/Ubuntu
Install on RHEL/CentOS/Fedora
Verify Installation
Basic Usage
Opening Files
Understanding the Interface
Keyboard Shortcuts Reference
File Handling
Editing Operations
Search and Replace
Deletion
Navigation
Advanced Operations
Information and Help
View and Display Options
Common Tasks
How to Save and Exit
How to Cut, Copy, and Paste
How to Search and Replace
How to Go to a Specific Line
Configuration
Nano Configuration File
Creating Custom Configuration
Useful Command-Line Options
Tips and Best Practices
Essential Tips
Syntax Highlighting
Working with Multiple Files
Troubleshooting
Common Issues
Conclusion
Linux: Setup Swap Memory
Prerequisites
Check Current Swap Memory
Turn Off Existing Swap
Create New Swap File
Configure Swap File Permissions
Initialize Swap Area
Make Swap Permanent
Final Verification
Troubleshooting
Swap file is not persisting after reboot
Insufficient disk space error
Permission denied errors
Additional Resources
Summary
Linux: Switch Between Multiple PHP Versions
Overview
Prerequisites
Manual PHP Version Switching
Switch From PHP 7.4 to PHP 8.1
Switch From PHP 8.1 to PHP 7.4
Troubleshooting
Switch PHP Script
Quick Example
Script Output
Best Practices
Version Management
Common Use Cases
Additional Commands
Check Current PHP Version
List Installed PHP Versions
Install Additional PHP Versions
User Guide - Logicrays
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