Wildcards, also know as globbing, provide a way to select a subset of files based on patterns of characters.
This is especially useful if you work with many files.
* – any number of any character.
? – any single character
[characters] – any character that is in the list [characters]
! – reverses the condition
[[:class:]] – any character that is a memnber of the class [:class:]
Most commonly used classes: