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主题必须以字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
13 行
429 B
13 行
429 B
#1
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for i in `seq 50000`;do echo $RANDOM | md5sum | cut -c 1-9 ;done > 1.txt
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sort -d 1.txt | uniq
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sort -n 1.txt | uniq
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sort -d 1.txt | uniq > 1_uniq_by_asc.txt
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sort -n 1.txt | uniq > 1_uniq_by_num.txt
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cat 1_uniq_by_asc.txt | uniq >> 1_uniq_total.txt
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cat 1_uniq_by_num.txt | uniq >> 1_uniq_total.txt
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#2
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for i in `seq 50000`;do echo $RANDOM | md5sum | cut -c 1-9 ;done > 2.txt
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grep 'computer' 2.txt
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grep -o 'computer' 2.txt | wc -l
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