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man grep- -A NUM, --after-context=NUM
- Print NUM lines of trailing context after matching lines.
- Places a line containing a group separator (--) between
- contiguous groups of matches. With the -o or --only-matching
- option, this has no effect and a warning is given.
- -B NUM, --before-context=NUM
- Print NUM lines of leading context before matching lines.
- Places a line containing a group separator (--) between
- contiguous groups of matches. With the -o or --only-matching
- option, this has no effect and a warning is given.
- -C NUM, -NUM, --context=NUM
- Print NUM lines of output context. Places a line containing a
- group separator (--) between contiguous groups of matches. With
- the -o or --only-matching option, this has no effect and a
- warning is given.
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