Filenames, Wildcards and Pathname Expansion

Regular Expressions

What is an expression? An expression doesn't literally mean what it says. An expression, even in computer technology, is not somethng to be interpreted literally. It is something that needs to be evaluated. An expression describes a result. An expression tells the computer how to produce a result.

Basic Wildcards

Wildcard Matches ? Any single character

• Any string of character

[set] Any character in set [!set] Any character not in set

password too short

aap

?   a
*   a
[set]
[!set]

aap

Special characters	Usage
row 1, cell 1	row 1, cell 2
row 2, cell 1	row 2, cell 2

Cells left-aligned, table centered

Duis	aute	irure
dolor	in reprehenderit	in voluptate velit
esse cillum dolore	eu fugiat nulla	pariatur.