What are other common chmod permissions?

Here are some common chmod permissions represented in octal notation:

1. 777:

   • Owner: Read, Write, Execute (7)
   • Group: Read, Write, Execute (7)
   • Others: Read, Write, Execute (7)
   • Use Case: Full access for everyone, often used for public files but can pose security risks.

2. 755:

   • Owner: Read, Write, Execute (7)
   • Group: Read, Execute (5)
   • Others: Read, Execute (5)
   • Use Case: Common for scripts and directories where the owner needs to modify, but others can only read and execute.

3. 644:

   • Owner: Read, Write (6)
   • Group: Read (4)
   • Others: Read (4)
   • Use Case: Typical for files where the owner needs to edit, but others can only view.

4. 600:

   • Owner: Read, Write (6)
   • Group: No permissions (0)
   • Others: No permissions (0)
   • Use Case: Secure files that should only be accessible by the owner, such as private keys.

5. 400:

   • Owner: Read (4)
   • Group: No permissions (0)
   • Others: No permissions (0)
   • Use Case: Read-only access for the owner, often used for sensitive files that should not be modified.

6. 500:

   • Owner: Read, Execute (5)
   • Group: No permissions (0)
   • Others: No permissions (0)
   • Use Case: Allows the owner to run a script or program without allowing others to access it.

Summary

These common permissions help manage access control effectively in Unix-like systems. Always consider the security implications when setting permissions, especially when using more permissive settings like 777.

If you have further questions or need examples of specific use cases, feel free to ask!