Upgrade Yun's OS

I found this Releases · RedSnake64/openwrt-yun · GitHub but I don't know how to upgrade my Yun to this version.

Anyone can help me?

I think I've found something:

Have you seen this discussion about that repository? OpenWrt Chaos Calmer is final

This is what I am trying to do

linino> setenv serverip 192.168.2.1;

linino> setenv ipaddr 192.168.2.18;

linino> tftp 0x80060000 openwrt-1.2-ar71xx-generic-yun-squashfs-sysupgrade.bin;

dup 0 speed 10
Using eth0 device
TFTP from server 192.168.2.1; our IP address is 192.168.2.18
Filename 'openwrt-1.2-ar71xx-generic-yun-squashfs-sysupgrade.bin'.
Load address: 0x80060000
Loading: *
TFTP error: 'Access violation' (2)
Starting again

eth1 link down
FAIL

The Yun is connected with the ethernet cable to my laptop

Ok, the files were not accessible. No I've changed the permissions and it's working.

openwrt-1.2-ar71xx-generic-yun-squashfs-sysupgrade.bin

What's this .bin for?