journalctl -f
Put your CF card into a reader attached to your Linux PC. You should see the device name pop up
exit journalctl with ctrl-c
Decompress your image
sudo xz -d
Write your image to the CF card
sudo dd if= of= bs=1M
example: sudo dd if=vamp-Fedora-Minimal-armhfp-22-20150627-sda.raw of=/dev/sdb bs=1M