TS-4900 Wheezy Getting started
From embeddedTS Manuals
While the Yocto distribution provides a more powerful cross compiler environment and better support for the graphics in the i.MX6, the Debian image provides a much larger community and prebuilt packages for armhf.
To write this to an SD card, first partition the SD card to have one large ext4 partition. See the guide here for more information. Once it is formatted, extract this tar with:
# Assuming your SD card is /dev/sdc with one partition
mkfs.ext4 /dev/sdc1
mkdir /mnt/sd/
sudo mount /dev/sdc1 /mnt/sd/
sudo tar xjf debian-armhf-wheezy-20150326.tar.bz2 -C /mnt/sd
sudo umount /mnt/sd
sync