What are the best practices for using chmod in Linux?

What are the best practices for using chmod in Linux?

When using chmod, it's important to follow best practices like using symbolic modes over numeric modes, applying the principle of least privilege, and avoiding recursive changes unless necessary.

Can you explain the principle of least privilege?

The principle of least privilege means giving users only the permissions they need to perform their tasks, reducing the risk of accidental or malicious changes.

What are symbolic modes and how do they differ from numeric modes?

Symbolic modes use letters (u, g, o) to represent user, group, and others, while numeric modes use numbers (0-7) to set permissions. Symbolic modes are often clearer and easier to understand.

Are there any common mistakes to avoid when using chmod?

Yes, common mistakes include setting overly permissive permissions (like 777), forgetting to check current permissions before changing them, and using recursive changes without understanding the implications.