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#1. AND

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#1.1. pipe를 이용해 여러번 사용

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cat test.txt | grep pattern1 | grep pattern2
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#1.2. -E 옵션 사용

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#2. OR

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#2.1. -e 옵션 사용

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$ cat test.txt | grep -e pattern1 -e pattern2
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#2.2. -E 옵션 사용

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$ cat test.txt | grep -E "pattern1|pattern2"
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#3. NOT

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3.1. -v 옵션을 이용

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cat test.txt | grep -v pattern1 | grep -v pattern2
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(사용로그)

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$ cat log | grep -E "Done createContract \\[[0-9]{4,5}\\]" -B32 | grep -E "Request|controller| \\[[7-9]{1}[0-9]{2}| \\[[0-9]{4,5}\\]"\n$ cat total2.log | grep -B25 "Done renewContract" | grep -E " \\[1[5-9]{1}[0-9]{2}| \\[[2-9]{1}[0-9]{3,4}\\]| \\[[1-9]{1}[0-9]{4}\\]| \\[[7-9]{1}[0-9]{2}"
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