ShellWildcards

~	path of users home directory (aka $HOME)
?	Any single character
*	Any string of characters
[aeiou]	Any vowel
[!aeiou]	Any character that's not a, e, i, o, or u
{jpg,gif}	either "jpg" or "gif"

example:

ls images/Project[4-6].txt

matches:

• images/Project4.txt
• images/Project5.txt
• images/Project6.txt

but not:

• images/Project3.txt

and

mv foo/*.{jpg,gif} images

is handy for moving all the image files from one directory (foo) to another (images).