Move files containing X but not containing Y

Question

To manage my backup sync folder, I am trying to come up with a command that would move files beginning with string1* but NOT ending with *string2 from /folder1 to /folder2

What would a command containing such two opposite conditions (HAS and HAS NOT) look like?

Answer 1

#!/bin/bash
for i in `ls -d /folder1/string1* | grep -v 'string2$'`
do
   ls -ld $i | grep '^-' > /dev/null # Test that we have a regular file and not a directory etc.
   if [ $? == 0 ]; then
      mv $i /folder2
   fi
done