[Wlug] list filenames within directory > output to text file?

Is there an app or command line tool which can copy all filenames within a certain directory, and output these filenames to a plain-text file? I need to list about 400 filenames, then drop these into an xl doc, in order to sort. Don't need to know permissions or anything else. I think sort might do it < http://ss64.com/bash/sort.html >, but probably I need help creating a command that will list only the file names, which I can then copy/paste to an xl doc. I am running Debian. I have one Squeeze and one Lenny here. Thanks extremely, Liz J