How to change directory permissions?

To change directory permissions in Unix-like systems, you can use the chmod command, similar to changing file permissions. Here’s how to do it:

Basic Syntax

chmod [options] mode directory

Common Options

• + : Adds a permission
• - : Removes a permission
• = : Sets the permission and overrides existing ones

Modes

You can specify permissions using:

• Symbolic notation:
  • u : user (owner)
  • g : group
  • o : others
  • r : read
  • w : write
  • x : execute

Example Commands

1. Add Execute Permission for Everyone:

   chmod +x directory_name

2. Remove Write Permission for Group:

   chmod g-w directory_name

3. Set Permissions to Read, Write, and Execute for User, and Read and Execute for Group and Others:

   chmod 755 directory_name

Recursive Changes

To change permissions for a directory and all its contents, use the -R option:

chmod -R 755 directory_name

This command sets the specified permissions for the directory and all files and subdirectories within it.