Shell Commands Glob Pattern Syntax/Rules

Glob patterns are like simplified regular expressions that shells use. An asterisk
(*) matches zero or more characters; [abc] matches any character inside the
brackets (in this case a, b, or c); a question mark (?) matches a single character;
and brackets enclosing characters separated by a hyphen([0-9]) matches any
character between them (in this case 0 through 9) .