UNIX CrossWord

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Across
  1. 2. execute the command with the privileges of super user
  2. 4. command to delete directories which are not empty
  3. 6. to get the last few lines of the file
  4. 7. Core of unix operating system
  5. 10. process status
Down
  1. 1. to get the disk space usage
  2. 2. reverse sorting
  3. 3. to decide default permissions of files and directories
  4. 5. pass the output of a command to another
  5. 8. to perform arithmetic operations in shell
  6. 9. to get the know the permissions of a file