python-paramiko

import time

import paramiko



class MySSH(object):

    def __init__(self):
        self.username="root"
        self.password="pwd"
        self.ip="127.0.0.1"
        self.connect_()

    def connect_(self):
        try:
            self.tran = paramiko.Transport((self.ip,22))#建立一个socket通道
            self.ssh = paramiko.SSHClient()
            self.tran.start_client() #启动一个客户端
            self.tran.auth_password(username=self.username, password=self.password)#用户名和密码登录
            self.ssh._transport = self.tran
            self.channel = self.tran.open_session()#打开一个会话通道
            self.channel.get_pty()#获取终端
            self.channel.invoke_shell()#激活终端
            print("连接成功")
        except paramiko.ssh_exception.SSHException:
            print('连接错误')
            return None

    def disconnect(self):
        self.channel.close()
        self.tran.close()

    def out(self, stdout):
        for line in stdout.readlines():
            print(line)
        print("===========")

    def exec(self, cmd):
        stdin, stdout, stderr = self.ssh.exec_command(cmd)
        self.out(stdout)

    def exec_ch(self, cmd):
        self.channel.send((cmd+"\n").encode("utf-8"))

    def recive_ch(self):
        print(self.channel.recv(65535).decode("utf-8"))
        print("==========================")

    def main(self):
        self.exec_ch("pwd")
        self.recive_ch()
        self.exec_ch("cd /")
        self.exec_ch("pwd")
        time.sleep(2)
        self.recive_ch()
        self.disconnect()



if __name__ == '__main__':
    MySSH().main()