|   |   |   |  Text processing
   1. Redirection revisited
   2. A pipe example
   3. The decompression pipeline
   4. A longer pipeline
   5. The text processing whirlwind begins
   6. cat, sort, and uniq
   7. wc, head, and tail
   8. tac, expand, and unexpand
   9. cut, nl, and pr
   10. tr, sed, and awk
   11. od, split, and fmt
   12. Paste, join, and tee
   13. Whirlwind over!  Redirection
   14. Using >>
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