I have a nexus 5 which has ubuntu touch on it. The OS is broken and won't boot. I am trying to flash CyanogenMod to it, i've hooked it up to my ubuntu server, and am following this: https://wiki.cyanogenmod.org/w/Install_CM_for_hammerhead
However when i get to the point of adb push to get the firmware onto the phones local storage i get:
error: device unauthorized. This adb server's $ADB_VENDOR_KEYS is not set
And on adb devices it says unauthorised. Since i have no booting OS on this phone, how can i get around this shit so i might complete my flashing process?
I've installed the Cyanogenmod recovery environment successfully and am able to boot into this.