Raspberry Pi: there was an error running option a0 update

So you're sitting there you think to yourself, 'I could do with updating my Pi' and you run the command 'sudo apt-get update' only to have the error 'there was an error running option a0 update' shoved in your face.

It's a tricky one but the following should sort your issue because it's probably due to your SD card becoming corrupt...

Run the following command:

sudo nano /var/lib/apt/sources.list

This will allow you to edit the file that tells your pi where to download its updates, delete everything within the file and add the following:

deb http://archive.raspbian.org/raspbian wheezy main contrib non-free

Source: https://www.raspbian.org/RaspbianRepository

Now hit ctrl+x and when it asks you to save, hit y and press the enter key, this'll overwrite the file.

Now run the following command: 

sudo nano /etc/apt/sources.list.d/raspi.list

Once again, this will let you edit the file. Delete everything from it and hit ctrl+x and when it asks you to save, hit y and press the enter key.

Then run this command to update:

sudo apt-get update

Now you should be able to run an upgrade by running this command:

sudo apt-get upgrade

Your Pi will then upgrade, you will probably loose any SSH connection you have open but it'll be okay once it's finished and you'll be able to use your Pi without any issues. Yay!