How do I clean up the Software Update cache?

[Gene Heskett]

On Monday 13 January 2014 23:55:39 Barry Premeaux did opine:

> I had a couple *.iso disks in my CD/DVD drive recently.  I had looked
> at the images, but did not install.  Now, i have a software update
> prompt and when I go to install, I am asked to put the two iso's in
> the drive.  If I cancel the request and try to continue with the
> updates, it fails to complete them.  My google efforts have failed to
> produce a solution to the problem.  How do I clean this up so that I
> can get back to regular updates?  I am running ubuntu 13.04.

Probably fixable to becoming root and editing /etc/apt/sources.list to 
remove the local optical drive line entirely.  Or you can put a # sign as 
the first character, which I believe does the same thing.

Cheers, Gene
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