Linux --xrandr command
Source: https://www.x.org/archive/current/doc/man/man1/xrandr.1.xhtml
https://blog.csdn.net/syh_486_007/article/details/71158022
https://blog.csdn.net/billbliss/article/details/72772792
http://www.thinkwiki.org/wiki/Xorg_RandR_1.2
https://blog.csdn.net/billbliss/article/details/72772792
display help information :
man xrandr (the help of linux)
infor xrandr (the help of linux)
xrandr --help (the help of itself)