I'm new to ubuntu/linux and currently I'm learning how to use commands in the terminal and every time it asks for my password it won't let me type it im using ubuntu 9.10 on acer extensa 5220
What do you mean "it won't let me type it"?
When prompted by the terminal to enter your password, your password will not be shown as you type. I believe this is done for security purposes (so no one can see what you're typing). You may be used to seeing asterisks populated instead of you actual password, but the only change I've ever noticed while typing my password into the terminal is that the cursor blink is interrupted while typing.
that was helpful