树莓派4B 关闭休眠，关闭屏保

1.安装

sudo apt install xscreensaver

2.打开xscreensaver

sudo xscreensaver-demo

3.设置

参考：https://zhuanlan.zhihu.com/p/192840118

https://blog.csdn.net/iteye_15896/article/details/81446725