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Why does the command 'cd ..' sometimes fail with 'Permission denied'?

hard📝 Conceptual Q10 of 15
Linux CLI - Navigating the File System
Why does the command 'cd ..' sometimes fail with 'Permission denied'?
ABecause cd .. is not a valid command
BBecause you lack permission to access the parent directory
CBecause the parent directory does not exist
DBecause cd commands require root user
Step-by-Step Solution
Solution:

  1. Step 1: Understand permission system

    Access to directories depends on user permissions set by the system.

  2. Step 2: Connect permission to cd .. failure

    If you don't have permission to read or execute the parent folder, cd .. will fail with 'Permission denied'.

  3. Final Answer:

    Because you lack permission to access the parent directory -> Option B

  4. Quick Check:

    Permission denied means no access rights [OK]
Quick Trick: Permission denied means you can't access that folder [OK]
Common Mistakes:
MISTAKES
  • Thinking cd .. is invalid
  • Assuming parent directory always exists and is accessible

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