就可以用了，再C-Kermit>输入c就连接上了串口
u@u-pc:/opt/kermit$ kermit C-Kermit 8.0.211, 10 Apr 2004, for Linux Copyright (C) 1985, 2004, Trustees of Columbia University in the City of New York. Type ? or HELP for help. (/opt/kermit/) C-Kermit>c Connecting to /dev/ttyUSB0, speed 115200 Escape character: Ctrl-\ (ASCII 28, FS): enabled Type the escape character followed by C to get back, or followed by ? to see other options. ---------------------------------------------------- OK 后边就是一大堆的开发板输出的信息要断开串口连接 同时按下键盘ctrl+\键，松开后再按下c键。