File And Directory Modes

• Standard Linux Permissions support three different modes.
  • Read
  • Write
  • Execute
    • Load file into memory and run on the CPU.
    • Sets execute bits.
• For directories:
  • Read Permissions - read the metadata of files in the directory.
    • If a user has read access to the directory.
      • Can list the contents of the directory.
        • Files and Directories inside it.
          • If user does not have read access and type ls, they will see a load of ? within the directory.
          • Where the metadata should be.
  • Write Permissions - Write to the directory.
    • Creating new files.
  • Execute Permissions on a directory
    • Allowed to enter and traverse the directory.