ch.4

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Across
  1. 2. Fast file-search command relying on a system database.
  2. 4. Variable defining where the shell looks for executables.
  3. 6. Command to reference a file via a hard or soft link.
  4. 7. Powerful search utility for files/directories by attributes.
  5. 8. Command to assign a new group owner to a file/directory.
  6. 10. Tool to display the full path of a command's executable.
  7. 12. Command to permanently remove files or directories.
  8. 13. Command to find a program's binary, docs, and source.
  9. 15. UNIX/Linux command for copying files or directories.
  10. 18. Programming technique using self-referential function calls.
  11. 19. Critical file system structure storing layout details.
  12. 20. Command revealing if a command is an alias, built-in, or external.
Down
  1. 1. Rules defining user/group access to files/directories.
  2. 3. User with exclusive rights to modify file/directory permissions.
  3. 5. Command to create a blank file or refresh its access time.
  4. 9. Algorithmic method to discard non-viable options early.
  5. 11. Command to transfer file/directory ownership to another user.
  6. 14. Command to delete directories only if they're empty.
  7. 16. User's default group for new files/directories.
  8. 17. File system structure storing metadata and data block pointers.