第二篇：ssh.invoke_shell() 切换root出现的新问题

def verification_ssh(host,username,password,port,root_pwd,cmd):
    s=paramiko.SSHClient()
    s.load_system_host_keys()
    s.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    s.connect(hostname = host,port=int(port),username=username, password=password)

    if username != 'root':
        ssh = s.invoke_shell()
        time.sleep(0.1)

        #先判断提示符，然后下一步在开始发送命令，这样大部分机器就都不会出现问题
        buff = ''
        while not buff.endswith('$ '):
            resp = ssh.recv(9999)
            # print(resp)
            buff += resp.decode('utf8')
            time.sleep(0.1)
        print('获取登录后的提示符：%s' %buff)


        ssh.send(' export LANG=en_US.UTF-8 n') #解决错误的关键，编码问题
        ssh.send('export LANGUAGE=en n')

        ssh.send('su - n')

        buff = ""
        while not buff.endswith('Password: '): #true
            resp = ssh.recv(9999)
            print(resp)
            buff +=resp.decode('utf8')

        print('hhhhh')
        print(buff)

        ssh.send(root_pwd)
        ssh.send('n')

        buff = ""
        # n = 0
        while not buff.endswith('# '):
            # n += 1
            resp = ssh.recv(9999)
            print(resp)
            buff +=resp.decode('utf8')
            # print(n)
            # if n >=3:
            #     break



        # print(buff)

        ssh.send('sh /tmp/check/101.sh') #放入要执行的命令
        ssh.send('n')
        buff = ''
        # m = 0
        while not buff.endswith('# '):
            resp = ssh.recv(9999).decode()
            buff +=resp
            # m += 1
            # print(m)

        result  = buff
        # print(type(result))
        # print(result)
        s.close()

if __name__ == "__main__":
    verification_ssh('测试IP地址', '普通账号', '普通账号的密码', '52222', 'root密码', 'id')