Python----Remotely execute linux commands through the paramiko library

[Original Link] Python----Remotely execute linux commands through the paramiko library

(1) First install the paramiko library

pip install paramiko

(2) The following classes are encapsulated and can be used directly

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) For example, prepare a linux virtual machine with an ip address of 192.168.1.12, and then directly use the above-encapsulated class according to the following method to realize remote execution of linux commands

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

(4) The execution results are as follows

begin to run remote cmd: ifconfig
ens33: 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 0

lo: 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 0

virbr0: 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