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  1. #!/bin/bash
  2. for i in `seq 1000`;do echo $RANDOM | md5sum | cut -c 1-9 ;done >> random1000.txt
  3. #以覆盖写的方式,字母排序,输出unique行
  4. sort -u random1000.txt > alph
  5. #以覆盖写的方式,数字排序,输出unique行
  6. sort -u -n random1000.txt > num
  7. #以追加写的方式,字母排序,输出unique行
  8. sort -u random1000.txt >> alph
  9. #以追加写的方式,数字排序,输出unique行
  10. sort -u -n random1000.txt >> num
  11. #继续在里面查找coumputer
  12. grep -c "Computer" random1000