给我写一个多线程操作服务器执行命令的Python脚本

下面是一个多线程操作服务器执行命令的Python脚本，使用了paramiko模块：

import threading
import paramiko

class ServerThread(threading.Thread):
    def __init__(self, host, user, password, command):
        threading.Thread.__init__(self)
        self.host = host
        self.user = user
        self.password = password
        self.command = command

    def run(self):
        ssh = paramiko.SSHClient()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        try:
            ssh.connect(self.host, username=self.user, password=self.password, timeout=5)
            print(f"Connected to {self.host}")
            stdin, stdout, stderr = ssh.exec_command(self.command)
            output = stdout.read().decode('utf-8')
            print(output)
        except Exception as e:
            print(f"Failed to connect to {self.host}: {e}")
        finally:
            ssh.close()

if __name__ == '__main__':
    hosts = ['192.168.1.1', '192.168.1.2', '192.168.1.3']
    user = 'username'
    password = 'password'
    command = 'ls -l /'

    threads = []
    for host in hosts:
        thread = ServerThread(host, user, password, command)
        thread.start()
        threads.append(thread)

    for thread in threads:
        thread.join()

    print("All commands executed.")

该脚本会创建一个ServerThread类，实现了多线程操作多个服务器执行相同的命令。在主程序中，我们定义了需要操作的服务器列表、用户名、密码和命令，然后依次创建每个服务器的线程，启动线程并等待线程执行完毕。