树莓派安装centos 7系统

1，格式化 https://www.sdcard.org/downloads/formatter_4/eula_windows/

2，烧录，Win32DiskImager

https://sourceforge.net/projects/win32diskimager/

3，下载centos,最好都下载最新的raw.xz

http://mirror.centos.org/altarch/7/isos/armhfp/

http://mirror.centos.org/altarch/7/os/armhfp/Packages/

https://buildlogs.centos.org/centos/7/isos/armhfp/

解压得到raw

以管理员身份运行Win32DiskImager，选择已解压好的raw文件及目标Micro-SD卡，点击Wirte开始写入，过程大约3分钟。

https://raspberrypi.stackexchange.com/questions/81458/why-am-i-getting-a-rainbow-screen-and-flashing-red-pwr-led-with-a-new-raspberry

https://elinux.org/R-Pi_Troubleshooting#Green_LED_blinks_in_a_specific_pattern

或在linux下

xz -cd SLES-12-SP2-ARM-X11-raspberrypi3_aarch64.aarch64-2016.10.04-GM.raw.xz | dd of=/dev/sdb bs=4096