If you don't have the globstar optional behavior enabled in bash this won't work. From the manual: If set, the pattern ‘*’ used in a filename expansion contex

If you don't have the globstar optional behavior enabled in bash this won't work. From the manual: If set, the pattern ‘*’ used in a filename expansion context will match all files and zero or more directories and subdirectories. If the pattern is followed by a ‘/’, only directories and subdirectories match. To enable: $ shopt -s globstar To disable: $ shopt -u globstar