How to interpret permissions?

In Linux, file and directory permissions are represented by a string of characters that indicate what actions users can perform. Here's how to interpret them:

Permission String Format

The permission string typically looks like this:

-rwxr-xr--

Breakdown of the String

1. File Type: The first character indicates the type:

   • -: Regular file
   • d: Directory
   • l: Symbolic link

2. User Permissions: The next three characters represent the owner's permissions:

   • r: Read permission
   • w: Write permission
   • x: Execute permission

3. Group Permissions: The following three characters represent the group's permissions:

   • r: Read permission
   • w: Write permission
   • x: Execute permission

4. Other Permissions: The last three characters represent permissions for others (everyone else):

   • r: Read permission
   • w: Write permission
   • x: Execute permission

Example Interpretation

For the permission string -rwxr-xr--:

• It is a regular file (-).
• The owner has read, write, and execute permissions (rwx).
• The group has read and execute permissions (r-x).
• Others have only read permission (r--).

Summary

• Read (r): Allows viewing the file or directory contents.
• Write (w): Allows modifying the file or directory.
• Execute (x): Allows executing a file or accessing a directory.

If you have more questions or need clarification, feel free to ask!