cannot free up disk space on ubuntu (3.4GiB.. at 3.1 now)

'sudo apt-get clean' will remove packages from your local cache.

okay.. where do i type that in to do this?  like i said, i need very basic instructions.. i saw this on other responses to other questions, but i dont know where i am supposed to type this thing.. thanks

--- On Wed, 4/29/09, Micah Gersten <email address hidden> wrote:
From: Micah Gersten <email address hidden>
Subject: Re: [Question #69128]: cannot free up disk space on ubuntu (3.4GiB.. at 3.1 now)
To: <email address hidden>
Date: Wednesday, April 29, 2009, 1:31 AM

Your question #69128 on Ubuntu changed:
https://answers.launchpad.net/ubuntu/+question/69128

    Status: Open => Answered

Micah Gersten proposed the following answer:
'sudo apt-get clean' will remove packages from your local cache.

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Type the command into a terminal (Applications>Accessories>Terminal)

when i enter sudo apt-get clean into the terminal it asks for a password but does not let me type anything.. any ideas?? thanks for the help so far.. this computer is getting me so mad

--- On Wed, 4/29/09, kernowyon <email address hidden> wrote:
From: kernowyon <email address hidden>
Subject: Re: [Question #69128]: cannot free up disk space on ubuntu (3.4GiB.. at 3.1 now)
To: <email address hidden>
Date: Wednesday, April 29, 2009, 5:04 PM

Your question #69128 on Ubuntu changed:
https://answers.launchpad.net/ubuntu/+question/69128

    Status: Open => Answered

kernowyon proposed the following answer:
Type the command into a terminal (Applications>Accessories>Terminal)

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If you type in the command mentioned above, you will be asked for a password.
As you type in the password, you will not see anything - no letters or asterisks will appear. Once you have entered the password, just press enter and you should see things happening. Once all is done, you will be back to the initial prompt and can simply close the terminal (type exit and press enter)