Levels of permissions:
- Read: Display content of file
- Write: Make changes to file/folder
- Execute: Run programs (compiled binaries)
- Representation: rwxrwxrwx or 777
Note: There exists a special pseudo permission called Sticky bits which is used to prevent accidental deletions.
Types of permissions:
- User
- Group
- Other
Example
- Remove write permission for group and others
- Add execute permissions to all
