如何使用 Putty 在Ubuntu连接 Serial 端口连接 Cisco 路由器 ？

[Valdis]

我的笔记本上没有 Serial 接口，找了一个USB 转 RS232 插在了USB 接口上。
通过 lsusb 在终端里可以看到：
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 004: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 003 Device 002: ID 044e:300d Alps Electric Co., Ltd Bluetooth Controller (ALPS/UGPZ6)
Bus 005 Device 006: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
通过 dmseg 在终端里可以看到：
[ 23.990031] wlan0: associated
[ 23.994123] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 34.688097] wlan0: no IPv6 routers present
[ 39.250231] audit_printk_skb: 54 callbacks suppressed
[ 39.250237] type=1400 audit(1333334754.770:30): apparmor="DENIED" operation="file_mmap" parent=1899 profile="/usr/lib/telepathy/telepathy-*" name="/usr/lib/purple-2/libqq.so" pid=1900 comm="telepathy-haze" requested_mask="m" denied_mask="m" fsuid=1000 ouid=1000
[ 39.250463] type=1400 audit(1333334754.770:31): apparmor="DENIED" operation="file_mmap" parent=1899 profile="/usr/lib/telepathy/telepathy-*" name="/usr/lib/purple-2/libqq.so" pid=1900 comm="telepathy-haze" requested_mask="m" denied_mask="m" fsuid=1000 ouid=1000
[ 161.382611] WARNING! power/level is deprecated; use power/control instead
[ 161.463812] usb 2-1: USB disconnect, device number 2
[ 163.336140] usb 5-2: USB disconnect, device number 2
[ 166.956072] usb 5-2: new full-speed USB device number 3 using uhci_hcd
[ 167.209600] usbcore: registered new interface driver usbserial
[ 167.209619] USB Serial support registered for generic
[ 167.209667] usbcore: registered new interface driver usbserial_generic
[ 167.209670] usbserial: USB Serial Driver core
[ 167.251461] USB Serial support registered for pl2303
[ 167.251494] pl2303 5-2:1.0: pl2303 converter detected
[ 167.262960] usb 5-2: pl2303 converter now attached to ttyUSB0
[ 167.262981] usbcore: registered new interface driver pl2303
[ 167.262983] pl2303: Prolific PL2303 USB to serial adaptor driver
[ 172.264127] usb 5-2: USB disconnect, device number 3
[ 172.264366] pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0
[ 172.264381] pl2303 5-2:1.0: device disconnected
[ 182.284103] usb 5-2: new low-speed USB device number 4 using uhci_hcd
[ 182.476477] input: PixArt USB Optical Mouse as /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/input/input11
[ 182.476837] generic-usb 0003:093A:2510.0002: input,hidraw0: USB HID v1.11 Mouse [PixArt USB Optical Mouse] on usb-0000:00:1d.0-2/input0
[ 184.904255] usb 5-1: new full-speed USB device number 5 using uhci_hcd
[ 185.062755] pl2303 5-1:1.0: pl2303 converter detected
[ 185.074956] usb 5-1: pl2303 converter now attached to ttyUSB0
[ 846.344260] usb 5-1: USB disconnect, device number 5
[ 846.346404] pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0
[ 846.346439] pl2303 5-1:1.0: device disconnected
[ 849.560204] usb 5-1: new full-speed USB device number 6 using uhci_hcd
[ 849.714504] pl2303 5-1:1.0: pl2303 converter detected
[ 849.726485] usb 5-1: pl2303 converter now attached to ttyUSB0

但是通过 Putty 连接时 显示的是：
Unable to open connection to ：
Unable to open serial port
现在不知道怎么解决，不知道有没有同胞和我遇到的问题是一样的。一样的话你们是怎么解决的/。 或者是哪位大侠帮小弟解决解决 。Linux 我算是新手 。
在这里先提前谢谢了。

[ljj_jjl2008]

我是被楼主标题吸引进来的。
然后，实话说，我没有看懂。

[fancsxx]

需要权限才可以读取/dev/下面的目录，你这样启动就行了。
sudo putty

[flyingbigsandy]

用sudo来试试，实在不行看看有木有把流控关掉呢？

[onlylove]

minicom路过……putty是windows下面常用的，linux下没用过……
只问下，你串口设置对了么？哦，还有楼上问的，权限有么？

[oneleaf]

试试 ：

sudo chmod 666 /dev/ttyUSB0

[poloshiao]

http://ubuntuforums.org/showthread.php? ... st12766624
The issue is that root owns the device /dev/ttyUSB0 therefore in order to use the connection the console software must also run as root. From the terminal: sudo putty then all console connections work as expected on both devices.