NOTE: Enable Linux Serial Console ================================================================================= Overview: --------------------------------------------------------------------------------- 在Single-Board/伺服器MB進行開發/測試時, 不一定都具備影像(VGA)輸出, 這時就透過console port進行指令的輸入, 並監控系統輸出 Do configuration on /etc/default/grub --------------------------------------------------------------------------------- command: `sudo vim /etc/default/grub` 原始的設定如下:  在`GRUB_CMDLINE_LINUX=""`中加入console輸出, 經由ttyS0, Baud值為115200  接著使用以下指令更新grub command: `sudo update-grub`  完成後, 重啟即可 Ref. --------------------------------------------------------------------------------- https://zhuanlan.zhihu.com/p/447014333 https://www.linusakesson.net/programming/tty/index.php https://blog.csdn.net/weixin_43863487/article/details/107951863
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