print lines matching a pattern |
-q, --quiet, --silent Quiet; do not write anything to standard output. Exit immediately with zero status if any match is found, even if an error was detected. Also see the -s or --no-messages option. (-q is specified by POSIX.) |
-i, --ignore-case Ignore case distinctions in both the PATTERN and the input files. (-i is specified by POSIX.) |