anchor.diff:  
   # Check whether a command exists - returns 0 if it does, 1 if it does not
   exists() {
  -  if command -v $1 &>/dev/null
  +  if command -v $1 >/dev/null 2>&1
     then
       return 0
     else
  
positive.code:   exit 1
  }
  
  if [ $downloader == "curl" ]
  then
    #do curl stuff
    grep "The specified key does not exist." "$tmp_dir/$filename" 2>&1 >/dev/null
  
negative.code: # Set the filename for a deb, based on version and machine
  deb_filename() {
    filetype="deb"
    if [ "$machine" = "x86_64" ];
    then
      filename="chef_${version}_amd64.deb"
    else
  