UNIX crossword

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Across
  1. 3. a link that can span file system boundaries is called a ______ link
  2. 6. lists the contents of a directory
  3. 7. without any files specified, cat reads from the standard ______
  4. 9. enables you to temporarily switch to another user
  5. 10. prints out the last lines of a file
  6. 14. files with names starting with a period are known as _____ files
  7. 16. what we usually call a command line interpreter
  8. 17. removes an empty directory
  9. 18. this is the line oriented portion of vi
  10. 19. calls up the GNU C compiler
  11. 20. used to send output to a printer
  12. 22. creates copy of file under a different name or path
Down
  1. 1. system process that is designed to run in the background
  2. 2. print out arguments to the command
  3. 4. ability to run more than one command at a time
  4. 5. it is unix convention to store binaries in a ____ directory
  5. 8. unix is a pun on ______ which was an operating system the early developers were working on
  6. 11. program that read input from standard input and writes to the standard output
  7. 12. tells computer about the capabilities of your terminal
  8. 13. create a directory
  9. 15. this is the clock daemon that will run commands for you on a regularly scheduled basis
  10. 16. display or set your tty settings
  11. 21. paginate a file