bash for mo

if [ "$#" -ne 1 ]; then
  echo "$0 <path to dir>"
  exit 1
fi

if [ -z "$1" ]; then
  echo "dir $1 not exists"
  exit 1
fi

find "$1" -maxdepth 1 -type f -name "*.bak" -o -name "*.tmp" -o -name "*.backup" -exec rm -fv {} +