If you are trying to update your Linux and your update is getting failed again and again then you should remove or rename existing update via this command on terminal


 sudo mkdir -p /var/lib/apt/lists/partial

then move this partial update on as temporary directory 

sudo mv /var/lib/apt/lists /tmp

then you should clean your update via this command

sudo apt-get clean

and then you should try update like this

sudo apt-get update

I am sure, your will over come from that funny error message.              Good Luck.