To add a confirmation prompt before renaming each file, modify the command as follows:

for f in *; do read -p "Rename $f to $(echo $f | sed 's/-//g')? [y/n]" -n 1 -r; echo ""; if [[ $REPLY =~ ^[Yy]$ ]]; then mv "$f" "$(echo $f | sed 's/-//g')"; fi; done

This modified command uses the "read" command to prompt the user for confirmation before renaming each file. If the user enters "y" or "Y", the command will proceed to rename the file using the "mv" command, as before. If the user enters "n" or any other input, the command will skip that file and move on to the next one.

Please note that this modification assumes that you are running the command in a terminal with interactive input enabled. If you are running the command in a non-interactive environment (e.g. as part of a batch script), you may need to modify the input prompt or implement a different confirmation mechanism.
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