.*any character (except for line terminators), repeated any number of times
Character Class[[:digit:]]+ +matches at least one character from the set below:
[:digit:]a digit [0-9]
\/the literal / (4710 / 578 / 2F16)
.+any character (except for line terminators), repeated at least once
$end of string, or before its final line terminator
g modifier: global. Finds all matches instead of stopping after the first