First download the Rasbian zip from here.

Unzip the zipped file.

unzip 2014-01-07-wheezy-raspbian.img

You need to find your sdcard name.  If you don’t now how to, take a look at this post.

Next format your card as Fat32.

Now write the image to the sdcard with the following command.  Replace the mmcblk0 part of “of=/dev/mmcblk0” with your drive name.

sudo dd if=~/2014-01-07-wheezy-raspbian.img of=/dev/mmcblk0 bs=4M

It will not display any information until it is finished, so be patience.

Once it is complete, eject it and plug it into your Raspberry Pi and boot it up.