How do I render a bash script with the variables expanded?

How can you display a Bash script with its variables expanded. I want to see what the script would actually execute, without doing 开发者_如何学Goanything.

There are three relevant options:

• -n - do not execute
• -v - show the code as it is read
• -x - show the code as it is executed

AFAIK, you can't see the expanded variables with -n in effect, but you can't avoid executing code unless -n is in effect. So, roughly, you have to execute the script to see the expanded variables.

You can use the -x option of bash as:

$bash -x myscript.sh

If you don't execute the variable assignments then there's nothing to expand.

prefix your commands with echo?