树莓派4 笔记

工作温度：
无风扇：56℃
带风扇：42℃

软件：Screen，多标签 Shell，断开不会中断任务，可恢复

https://www.chenhe.cc/p/139

https://www.ibm.com/developerworks/cn/linux/l-cn-screen/

http://www.raspigeek.com/index.php?c=home

CentOS7 32 bit

getconf LONG_BIT

http://shumeipai.nxez.com/2019/08/27/add-the-open-and-shutdown-keys-to-the-raspberry-pi.html