Grep pattern in file1/13/2024 ![]() Stop reading a file after NUM matching lines. The scanning will stop on the first match. Suppress normal output instead print the name of each input file from which output would normally have been printed. The scanning will stop on the first match Suppress normal output instead print the name of each input file from which no output would normally have been printed. The deprecated environment variable GREP_COLOR is still supported, but its setting does not have priority The colors are defined by the environment variable GREP_COLORS. Surround the matched (non-empty) strings, matching lines, context lines, file names, line numbers, byte offsets, and separators (for fields and groups of context lines) with escape sequences to display them in color on the terminal. With the -v, -invert-match option, count non-matching lines. Suppress normal output instead print a count of matching lines for each input file. Select only those matches that exactly match the whole line. Word-constituent characters are letters, digits, and the underscore Similarly, it must be either at the end of the line or followed by a non-word constituent character. The test is that the matching substring must either be at the beginning of the line, or preceded by a non-word constituent character. Select only those lines containing matches that form whole words. Invert the sense of matching, to select non-matching lines. Ignore case distinctions in both the PATTERN and the input files. This can be used to specify multiple search patterns, or to protect a pattern beginning with a hyphen (-). ![]() Interpret PATTERN as a basic regular expression (BRE, see below). Interpret PATTERN as a list of fixed strings, separated by newlines, any of which is to be matched. Interpret PATTERN as an extended regular expression (-E is specified by POSIX.) Print a usage message briefly summarizing these command-line options and the bug-reporting address, then exit ![]()
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