Python Pexpect未按预期工作。它没有在虚拟机上返回正确的输出

[注意：我已经在物理机上运行了这段代码，它可以工作（OS=Fedora 14）。但是当我在虚拟机上安装的Ubuntu中使用相同的脚本时，它就不工作了。我正在尝试捕获ifconfig输出并保存/打印它。]

我已经在VMPlayer上安装了Ubuntu（它是虚拟机）。我正在使用python脚本语言，并尝试使用Pexpect自动化SSH连接。我正在同一台Ubuntu虚拟机上运行脚本。下面是我正在使用此脚本执行的操作的详细信息：

使用Pexpect，通过SSH连接到本地主机

执行“ifconfig”cli命令并捕获输出

打印此cli输出

代码段： 结果输出： 预期产出： 如果我手动执行SSH登录到本地主机并在CLI上执行IFCONFIG命令，那么我将在屏幕上看到以下输出：

admin@ubuntu12:/home/Host# ssh admin@192.168.2.5
admin@192.168.2.5's password:
Welcome to Ubuntu 12.04.3 LTS (GNU/Linux 3.2.0-29-generic-pae i686)

 * Documentation:  https://help.ubuntu.com/

67 packages can be updated.
35 updates are security updates.

Last login: Sat Sep 21 22:55:36 2013 from 192.168.2.5
admin@ubuntu12:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0c:29:60:6b:be
          inet addr:192.168.2.5  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe60:6bbe/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4270 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3664 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:463331 (463.3 KB)  TX bytes:625129 (625.1 KB)
          Interrupt:19 Base address:0x2024

eth1      Link encap:Ethernet  HWaddr 00:0c:29:60:6b:c8
          inet addr:20.20.20.2  Bcast:20.20.20.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe60:6bc8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:153 errors:0 dropped:0 overruns:0 frame:0
          TX packets:105 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:15340 (15.3 KB)  TX bytes:14388 (14.3 KB)
          Interrupt:16 Base address:0x20a4

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:1456 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1456 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:192908 (192.9 KB)  TX bytes:192908 (192.9 KB)

admin@ubuntu12:~$

---

将所有“\r\n”替换为“\n”，它将正常工作

我假设您的ip与主机=Linux中的1.1.1.1不同（“1.1.1.1”、“admin”、“admin123”、“ubuntu”）@blueberryfields:谢谢您的回复。IP没有问题。我在发布代码时已将IP地址更改为1.1.1.1。请改为使用“localhost”。如果我建立连接并返回spawn\u会话id，并在类外使用此spawn\u会话，则此操作有效。即使我尝试在executeCLI方法中传递spawn_会话id，并尝试在方法内部使用以执行“ifocnfig”命令。但它仍然不起作用。

admin@ubuntu12:/home/Host# python Linux.py
Output : 12: ~admin12:~$

admin@ubuntu12:/home/Host#

admin@ubuntu12:/home/Host# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0c:29:60:6b:be
          inet addr:192.168.2.5  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe60:6bbe/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1733 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1539 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:205502 (205.5 KB)  TX bytes:252126 (252.1 KB)
          Interrupt:19 Base address:0x2024

eth1      Link encap:Ethernet  HWaddr 00:0c:29:60:6b:c8
          inet addr:20.20.20.2  Bcast:20.20.20.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe60:6bc8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:49 errors:0 dropped:0 overruns:0 frame:0
          TX packets:82 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:5132 (5.1 KB)  TX bytes:12322 (12.3 KB)
          Interrupt:16 Base address:0x20a4

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:170 errors:0 dropped:0 overruns:0 frame:0
          TX packets:170 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:27353 (27.3 KB)  TX bytes:27353 (27.3 KB)

admin@ubuntu12:/home/Host#

admin@ubuntu12:/home/Host# ssh admin@192.168.2.5
admin@192.168.2.5's password:
Welcome to Ubuntu 12.04.3 LTS (GNU/Linux 3.2.0-29-generic-pae i686)

 * Documentation:  https://help.ubuntu.com/

67 packages can be updated.
35 updates are security updates.

Last login: Sat Sep 21 22:55:36 2013 from 192.168.2.5
admin@ubuntu12:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0c:29:60:6b:be
          inet addr:192.168.2.5  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe60:6bbe/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4270 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3664 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:463331 (463.3 KB)  TX bytes:625129 (625.1 KB)
          Interrupt:19 Base address:0x2024

eth1      Link encap:Ethernet  HWaddr 00:0c:29:60:6b:c8
          inet addr:20.20.20.2  Bcast:20.20.20.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe60:6bc8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:153 errors:0 dropped:0 overruns:0 frame:0
          TX packets:105 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:15340 (15.3 KB)  TX bytes:14388 (14.3 KB)
          Interrupt:16 Base address:0x20a4

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:1456 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1456 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:192908 (192.9 KB)  TX bytes:192908 (192.9 KB)

admin@ubuntu12:~$