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ooption is there - unixhelp.ed.ac.uk/CGI/man-cgi?grep : -o, --only-matching Show only the part of a matching line that matches PATTERNgrep -Eow -e "[0-9]+" -e "[abc]{2,3}"I don't know how you could require those two expressions to be on one line aside from piping from a previous grep (which could still not work if either pattern matches more than once on a line).