Is there any way to remove all of the files in a directory except for one with a certain filename? For instance, if I had a directory containing the files file1, file2, and dontdelete. Would there be any way to quickly delete file1, and file2 and not dontdelete? I know that I could just do rm file1 file2 but that wouldn't work for a bunch of files. Also, I'm on Mac OS X if that makes a difference.
Answer
In bash:
shopt -s extglob
rm !(dontdelete)
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