How to interpret symbolic notation?

To interpret symbolic notation for file permissions in Linux, you can break down the notation into its components. The symbolic notation typically appears in the output of commands like ls -l and follows this format:

-rwxr-xr--

Breakdown of the Notation:

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

   • -: Regular file
   • d: Directory
   • l: Symbolic link
   • c: Character device
   • b: Block device
   • s: Socket
   • p: Named pipe (FIFO)

2. User Permissions: The next three characters represent the permissions for the owner of the file:

   • r: Read permission
   • w: Write permission
   • x: Execute permission
   • -: No permission

3. Group Permissions: The following three characters represent the permissions for the group associated with the file:

   • r: Read permission
   • w: Write permission
   • x: Execute permission
   • -: No permission

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

   • r: Read permission
   • w: Write permission
   • x: Execute permission
   • -: No permission

Example Interpretation:

For the symbolic notation -rwxr-xr--:

• File Type: - (regular file)
• Owner Permissions: rwx (read, write, and execute)
• Group Permissions: r-x (read and execute, but no write)
• Other Permissions: r-- (read only)

Summary:

• The first character indicates the file type.
• The next three characters show the owner's permissions.
• The following three characters show the group's permissions.
• The last three characters show the permissions for others.

This interpretation helps you understand who can access and modify the file and in what ways.