![]() c, -count only print a count of matching lines per FILE l, -files-with-matches only print FILE names containing matches L, -files-without-match only print FILE names containing no match exclude-from=FILE files that match PATTERN in FILE will be skipped. exclude=PATTERN files that match PATTERN will be skipped. ![]() include=PATTERN files that match PATTERN will be examined R, -r, -recursive equivalent to -directories=recurse D, -devices=ACTION how to handle devices, FIFOs and sockets d, -directories=ACTION how to handle directories I equivalent to -binary-files=without-match a, -text equivalent to -binary-files=text TYPE is 'binary', 'text', or 'without-match' binary-files=TYPE assume that binary files are TYPE q, -quiet, -silent suppress all normal output o, -only-matching show only the part of a line matching PATTERN label=LABEL print LABEL as filename for standard input ![]() h, -no-filename suppress the prefixing filename on output H, -with-filename print the filename for each match line-buffered flush output on every line n, -line-number print line number with output lines b, -byte-offset print the byte offset with output lines m, -max-count=NUM stop after NUM matches mmap use memory-mapped input if possible V, -version print version information and exit v, -invert-match select non-matching lines z, -null-data a data line ends in 0 byte, not newline x, -line-regexp force PATTERN to match only whole lines w, -word-regexp force PATTERN to match only whole words i, -ignore-case ignore case distinctions ![]() e, -regexp=PATTERN use PATTERN as a regular expression P, -perl-regexp PATTERN is a Perl regular expression G, -basic-regexp PATTERN is a basic regular expression F, -fixed-strings PATTERN is a set of newline-separated strings E, -extended-regexp PATTERN is an extended regular expression Search for PATTERN in each FILE or standard input.Įxample: grep -i 'hello world' menu.h main.c GNU grep has a very easy solution for this the -A/B/C flags, as shown on my Mac warwick egg$ grep -help Today I was asked by a colleague how to match a regex in a text file and return a specific number of lines both before and after the match. ![]()
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