Test whether a glob has any matches in bash

Question

If I want to check for the existence of a single file, I can test for it using test -e filename or [ -e filename ].

Supposing I have a glob

Answer 1

if ls -d $glob > /dev/null 2>&1; then
  echo Found.
else
  echo Not found.
fi

Note that this can be very time cosuming if there are a lot of matches or file access is slow.