📘 BAT (Batch) Scripts

1. Introduction to Batch Scripts

   • What is a Batch Script?

   • History and Usage

   • Advantages and Limitations

   • Getting Started with Bat script

     • Creating a .bat File

     • Running a Batch Script

     • Basic Syntax and Rules

2. Core Concepts

   • Echo and @Echo Off

   • Comments (REM and ::)

   • Variables and Environment Variables

   • Input and Output (SET, PAUSE, ECHO)

   • User Input and Arguments

     • %1, %2, ... %9 Positional Parameters

     • SHIFT , SET /P for User Input

3. Control Flow

   • Conditional Statements (IF, IF EXIST)

   • Loops (FOR, FOR /L, FOR /F)

   • GOTO and Labels

   • EXIT and Errorlevels

   Functions and Subroutines

   • Using CALL

   • Creating Reusable Code Blocks - Example of Subroutines

4. Working with Files and Directories

   • Creating, Deleting, and Renaming Files

   • File Extensions and Wildcards

   • Copying and Moving Files (COPY, XCOPY, ROBOCOPY)

   • Directory Operations (MD, RD, DIR, CD, PUSHD, POPD)

5. Error Handling and Logging

   • ERRORLEVEL and IF ERRORLEVEL

   • Redirecting Output (>, >>, 2>, 2>&1)

   • Logging Script Output

   • Debugging and Troubleshooting

     • Using ECHO for Debugging

     • Checking Variable Expansion

     • Handling Script Errors

6. Scripting Examples

   • Backup Script
   • Cleanup Temp Files Script
   • Automating Software Installation
   • Network and Ping Test Script
   • Scheduled Task Script

7. Advanced Techniques

   • Registry Editing (REG ADD, REG DELETE)
   • Using WMIC and NET Commands
   • Integration with PowerShell or VBScript
   • Creating Menus in Batch

8. Best Practices

   • Script Organization
   • Commenting and Documentation
   • Naming Conventions
   • Security Considerations
   • Commonly Used Commands Reference
   • Useful Tools (e.g., Notepad++, CMD Extensions)