dropbear在嵌入式开发过程中用于调试监控，还可以放在A1200上玩玩； 利用dropbearkey来生成密钥：dropbearkey -t rsa -f dropbear_rsa_host_ke-dropbear in the embedded development process monitor for debugging, but also on the A1200 on the play dropbearkey use to generate key: dropbearkey