At a basic level, parameter expansion means changing Bash syntax into a value—expanding it. For example: echo "$foo" This simple variable turns into its assigned value. However, ...

Parameter expansion requires a bit of practice, but it can be very useful once you’ve become familiar with its many applications. Parameter expansion on a Linux system is a feature in the bash shell ...

If you use bash you already know what Parameter Expansion is, although you may have used it without knowing its name. Anytime you use a dollar sign followed by a ...

The bash man page is close to 40K words. It's not quite War and Peace, but it could hold its own in a rack of cheap novels. Given the size of bash's documentation, missing a useful feature is easy to ...