新买了树莓派3B，由于树莓派3B是arm v8的64位cpu，所以之前树莓派2B的archlinux包显然是不能用了。
从 https://archlinuxarm.org/platforms/armv8/broadcom/raspberry-pi-3#installation 这个页面可以看到，
The current installation uses the 32-bit Raspberry Pi 2 armv7h root filesystem. This will be changing eventually to use our AArch64 repository to take full advantage of the ARMv8 Cortex-A53 cores.
当前只能安装arm v7，v8的还没有。
所以按照该页面的教程操作即可。
注意在下载filesystem的时候，下载下面的这个包
http://archlinuxarm.org/os/ArchLinuxARM-rpi-2-latest.tar.gz
在树莓派3B上安装archlinux arm was originally published by ETY001 at DoMyself on May 11, 2016.