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grep large files
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| B = before | |
| A = after | |
| grep -B [number of lines] -A [number of lines] [search string] [file] | |
| If you want the same number of lines before and after you can use -C num. | |
| grep -C [number of lines] [search string] [file] | |
| Credit: http://stackoverflow.com/questions/9081/grep-a-file-but-show-several-surrounding-lines |
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