#How to delete a file starting with - or --
##NO.1 - NG
$ rm '--attack_metadata'
rm: unrecognized option '--attack_metadata'
Try 'rm ./--attack_metadata' to remove the file ‘--attack_metadata’.
Try 'rm --help' for more information.
##NO.2 - NG
$ rm *attack_metadata
rm: unrecognized option '--attack_metadata'
Try 'rm ./--attack_metadata' to remove the file ‘--attack_metadata’.
Try 'rm --help' for more information.
##NO.3 - OK!
rm ./--attack_metadata