Ubiquiti EdgeRouter

scp openwrt-ramips-mt7621-ubnt-erx-initramfs-factory.tar ubnt@192.168.1.1
ssh ubnt@192.168.1.1
ubnt@ubnt:~$ add system image openwrt-ramips-mt7621-ubnt-erx-initramfs-factory.tar
Checking upgrade image...Done
Preparing to upgrade...Done
Copying upgrade image.../usr/bin/ubnt-upgrade: line 509: [: too many arguments
Done
Removing old image...Done
Checking upgrade image...Done
Copying config data...Done
Finishing upgrade...Done
Upgrade completed
ubnt@ubnt:~$ show system image
The system currently has the following image(s) installed:
ramips r5484-69d22a6 SNAPSHOT (default boot) 
v1.7.1.4821926.151103.1114 (running image) 
A reboot is needed to boot default image
ubnt@ubnt:~$ reboot 
Proceed with reboot? [confirm][y]
Broadcast message from root@ubnt (pts/1) (Thu Jan  1 01:10:25 2015):
The system is going down for reboot NOW!