一、安装minicom
Ubuntu安装：sudo apt-get install minicom、
centos安装：yum install minicom
二、配置minicom
Ubuntu输入：sudo minicom -s
centos输入：minicom -s ##进入配置界面
+-----[configuration]------+
| Filenames and paths |
| File transfer protocols |
| Serial port setup | ###点进Serial port setup
| Modem and dialing |
| Screen and keyboard |
| Save setup as dfl |
| Save setup as.. |
| Exit |
| Exit from Minicom |
+--------------------------+
查看串口名称使用 ls -l /dev/ttyS* ,一般ttyS0对应com1，ttyS1对应com2；
查看串口驱动：cat /proc/tty/drivers/serial
查看串口设备：dmesg | grep ttyS* （查出那个串口激活了）
+-----------------------------------------------------------------------+
| A - Serial Device : /dev/ttyS1 |
| B - Lockfile Location : /var/lock |
| C - Callin Program : |
| D - Callout Program : |
| E - Bps/Par/Bits : 9600 8N1 |
| F - Hardware Flow Control : No |
| G - Software Flow Control : No |
| |
| Change which setting? |
+-----------------------------------------------------------------------+
| Screen and keyboard |
| Save setup as dfl |
| Save setup as.. |
| Exit |
| Exit from Minicom |
+--------------------------+
标红色是需要修改的地方，A改为那个端口激活了，E改为：9600 8N1
改完Save setup as dfl，保存一下
再在命令行输入minicom，连接到交换机。
原文：http://www.cnblogs.com/chimeiwangliang/p/7151154.html