The regex-equivalent for "anything" is usually "<dot><asterisk>" where the dot is for "any character" and the asterisk is for "any number of times (including ze

The regex-equivalent for "anything" is usually "<dot><asterisk>" where the dot is for "any character" and the asterisk is for "any number of times (including zero)". fd does necessarily pattern-match at the beginning of the file name, so there is no need for an asterisk at the beginning and at the end of the pattern. Your example would be: fd 'any.*thing'