from grep info. GNU FDL `?’ The preceding item is optional and will be matched at most once. $cat bu.txt bugy buggy bugggy $ $grep -E bug\?y bu.txt bugy $grep -E bugg\?y bu.txt bugy buggy $grep -E buggg\?y bu.txt buggy bugggy $
BEAUTY AND PLAY
from grep info. GNU FDL `?’ The preceding item is optional and will be matched at most once. $cat bu.txt bugy buggy bugggy $ $grep -E bug\?y bu.txt bugy $grep -E bugg\?y bu.txt bugy buggy $grep -E buggg\?y bu.txt buggy bugggy $