python下paramiko模块学习之一：ssh登录和执行命令

最近闲着学习python，看到有个paramiko模块，貌似很强大，可以模拟ssh登陆远程服务器，并且可以返回执行的命令结果，这次给大家介绍下如何利用已经建立的密钥来实现无需输入密码就可以登录服务器，代码十分简单。学着写了个一个小程序，可以直接在window下登录到linux，执行并返回执行结果。

下面直接贴代码：

#!/usr/bin/env python
import paramiko

#hostname='192.168.0.102'
hostname='172.28.102.250'
username='root'
password='abc'

#port=22
if __name__=='__main__':
paramiko.util.log_to_file('paramiko.log')
s=paramiko.SSHClient()
#s.load_system_host_keys()
s.set_missing_host_key_policy(paramiko.AutoAddPolicy())
s.connect(hostname = hostname,username=username, password=password)
stdin,stdout,stderr=s.exec_command('ifconfig;free;df -h')
print stdout.read()
s.close()

下面看下效果，呵呵：

s\501914252.HCA-FW9CX2X\Desktop\学习资料\python paramiko-ssh.py"
eth0      Link encap:Ethernet  HWaddr 00:24:01:01:EA:5C
inet addr:172.32.34.240  Bcast:172.32.255.255  Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:1428 errors:0 dropped:0 overruns:0 frame:0
TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:190928 (186.4 KiB)  TX bytes:128 (128.0 b)
Interrupt:20

eth1      Link encap:Ethernet  HWaddr 00:1F:29:03:54:3D
inet addr:172.28.102.250  Bcast:172.28.255.255  Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:99698 errors:0 dropped:0 overruns:0 frame:0
TX packets:12305 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:36420324 (34.7 MiB)  TX bytes:923630 (901.9 KiB)

lo        Link encap:Local Loopback
inet addr:127.0.0.1  Mask:255.0.0.0
UP LOOPBACK RUNNING  MTU:16436  Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

peth1     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
RX packets:99686 errors:0 dropped:0 overruns:0 frame:0
TX packets:12333 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:36818715 (35.1 MiB)  TX bytes:1006230 (982.6 KiB)
Interrupt:20 Memory:f3000000-f3010000

vif0.1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
RX packets:12305 errors:0 dropped:0 overruns:0 frame:0
TX packets:99702 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:923630 (901.9 KiB)  TX bytes:36420811 (34.7 MiB)

vif1.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
RX packets:5 errors:0 dropped:0 overruns:0 frame:0
TX packets:85175 errors:0 dropped:542 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:140 (140.0 b)  TX bytes:20377326 (19.4 MiB)

vif2.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
RX packets:5 errors:0 dropped:0 overruns:0 frame:0
TX packets:84859 errors:0 dropped:411 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:140 (140.0 b)  TX bytes:20301953 (19.3 MiB)

vif3.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
RX packets:5 errors:0 dropped:0 overruns:0 frame:0
TX packets:84337 errors:0 dropped:546 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:140 (140.0 b)  TX bytes:20174994 (19.2 MiB)

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00
inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

xenbr1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
RX packets:86405 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:19498121 (18.5 MiB)  TX bytes:0 (0.0 b)

total       used       free     shared    buffers     cached
Mem:       3359744     464724    2895020          0      31096     246296
-/+ buffers/cache:     187332    3172412
Swap:      5406712          0    5406712
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
221G   25G  185G  12% /
/dev/sda1              99M   22M   73M  23% /boot
tmpfs                 1.8G     0  1.8G   0% /dev/shm
none                  1.8G  152K  1.8G   1% /var/lib/xenstored

代码很简单，大家有兴趣，可以试验下，希望对您的学习和工作有帮助。

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