/********************************************************************************* *                           Ubuntu关闭进入screensaver模式 * 说明： *     在一定时间内未进行shell操作，系统会进入screensaver模式，通过uboot参数禁止。 * *                                              2018-2-26 深圳 宝安西乡 曾剑锋 ********************************************************************************/一、参考文档：    1. How do I disable the blank console “screensaver” on Ubuntu Server?        https://askubuntu.com/questions/138918/how-do-i-disable-the-blank-console-screensaver-on-ubuntu-server/356847    2. setterm command failing: "xterm does not support --blank" and "Inappropriato ioctl for device"        https://github.com/mdrjr/cloudshell_lcd/issues/2    3. Jessie : How to disable CLI screen blanking ? [SOLVED]        https://www.raspberrypi.org/forums/viewtopic.php?f=66&t=122112&sid=6931a43dd5a063441a1d720bdc94b386    4. Disable screen blanking on text console        https://unix.stackexchange.com/questions/8056/disable-screen-blanking-on-text-console    5. Prevent Raspberry Pi console screen blanking        https://defgw.wordpress.com/2015/11/29/raspberry-pi-screen-blanking/二、原因：    Type setterm -blank 0 on any shell to disable blanking out of tty consoles. 0 disables blanking, any value greater than 0 is the time in minutes. Default is 10. To permanently enable this you can add this line to your ~/.bashrc config.