❌ Top 10 Common Mistakes in Writing Scripts

1. Hardcoding Values

• Using fixed paths, IPs, or credentials inside the script.
• ✅ Use variables or config files instead.

2. Missing Input Validation

• Assuming user input or arguments are always correct.
• ✅ Always check for type, format, and range.

3. No Error Handling

• Ignoring exceptions or command failures.
• ✅ Use try/catch, if [ $? -ne 0 ], or similar.

4. Not Cleaning Up Temporary Files

• Leaving behind unused logs, temp data, or cache.
• ✅ Add cleanup functions or use trap in shell scripts.

5. Not Checking Command Return Codes

• Continuing the script even when a step fails.
• ✅ Always check exit codes before moving forward.

6. Poor Naming Conventions

• Using vague variable or function names (x, temp, data1).
• ✅ Use descriptive and consistent naming.

7. Infinite or Uncontrolled Loops

• Forgetting loop conditions or exit criteria.
• ✅ Always define clear limits and break conditions.

8. Lack of Documentation

• No comments, no usage instructions.
• ✅ Add inline comments and a help section (--help flag).

9. Storing Passwords in Plaintext

• Writing credentials directly in the code.
• ✅ Use environment variables or secure vaults.

10. Not Testing Before Deployment

• Running scripts directly in production without testing.
• ✅ Always test in a sandbox or staging environment first.