Python怎么通过paramiko库实现远程执行linux命令

（1）首先安装paramiko库

pip install paramiko

（2）封装了以下类，可以直接拿来使用

import paramiko

class SSHClient(object):
    def __init__(self,host,username,password,port=22):
        self.__host=host
        self.__username=username
        self.__password=password
        self.__port=port
        self.__ssh=None
        self.connect()

    def __del__(self):
        self.close()

    def connect(self):
        self.__ssh = paramiko.SSHClient()
        self.__ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        self.__ssh.connect(hostname=self.__host,port=self.__port,username=self.__username,password=self.__password)

    def exec(self,cmd):
        print(f"begin to run remote cmd: {cmd}")
        stdin, stdout, stderr = self.__ssh.exec_command(cmd,timeout=1800)
        returncode = stdout.channel.recv_exit_status()
        output=stdout.read().decode('utf-8')
        return output

    def close(self):
        self.__ssh.close()

（3）比如准备一个ip地址为192.168.1.12的linux虚拟机，然后直接按照如下方法使用上面封装的类即可实现远程执行linux命令

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ssh=SSHClient(host="192.168.1.12",username="root",password="xxxxxx")
output=ssh.exec("ifconfig")
print(output)

（4）执行结果如下

begin to run remote cmd: ifconfigens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500        inet 192.168.1.12  netmask 255.255.255.0  broadcast 192.168.1.255        inet6 240e:3a1:da7:6590:b39f:e15:6b3d:7e7  prefixlen 64  scopeid 0x0<global>        inet6 fe80::4a67:131d:9133:acdf  prefixlen 64  scopeid 0x20<link>        ether 00:0c:29:58:d8:4c  txqueuelen 1000  (Ethernet)        RX packets 195340  bytes 148862388 (141.9 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 163425  bytes 20837281 (19.8 MiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536        inet 127.0.0.1  netmask 255.0.0.0        inet6 ::1  prefixlen 128  scopeid 0x10<host>        loop  txqueuelen 1000  (Local Loopback)        RX packets 32  bytes 2592 (2.5 KiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 32  bytes 2592 (2.5 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255        ether 52:54:00:e8:3f:5c  txqueuelen 1000  (Ethernet)        RX packets 0  bytes 0 (0.0 B)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 0  bytes 0 (0.0 B)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

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