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20170728_100本ノック
10)
wc hightemp.txt
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sed -i 's/\t/ /g' ./hightemp.txt
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cat hightemp.txt | while read line; do echo $line | cut -d ' ' -f1 >> col1.txt; done
cat hightemp.txt | while read line; do echo $line | cut -d ' ' -f2 >> col2.txt; done
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paste col1.txt col2.txt
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head -10 hightemp.txt
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tail -10 hightemp.txt
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split -3 hightemp.txt
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cat col1.txt | sort | uniq
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