我已经多次阅读 Paramiko 文档。我仍然无法找到我的问题的答案：
为什么我不能打电话channel.invoke_shell()不打电话channel.get_pty()预先？ – 这是我对文档的理解 – 没有必要打电话channel.get_pty()如果我想用channel.exec_command()。但是如果我想使用交互式 shell 该怎么办channel.send() or channel.recv()。是强制性的吗？
这是我的尝试：
client = paramiko.SSHClient()
# Set SSH key parameters to auto accept unknown hosts
client.load_system_host_keys()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
# Connect to the host
client.connect(hostname=hostname, username=username, password=password)
channel = client.get_transport().open_session()
channel.invoke_shell() # ---> Channel closed Exception here
channel.send(cmd + "\r")
有了这个我得到paramiko.ssh_exception.SSHException: Channel closed。如果我打电话channel.get_pty() before invoke_shell()有用。我只想使用交互式 shell，而不是终端语义。是否可以？
链接日志：
plink.exe -T -v user@host -pw password interactive-tool.exe
Looking up host "host" for SSH connection
Connecting to host port 22
We claim version: SSH-2.0-PuTTY_Release_0.72
Remote version: SSH-2.0-OpenSSH_for_Windows_7.7
Using SSH protocol version 2
No GSSAPI security context available
Doing ECDH key exchange with curve Curve25519 and hash SHA-256 (unaccelerated)
Server also has ecdsa-sha2-nistp256/ssh-rsa host keys, but we don't know any of them
Host key fingerprint is:
ssh-ed25519 255 xx:xx:xx:xx
Initialised AES-256 SDCTR (AES-NI accelerated) outbound encryption
Initialised HMAC-SHA-256 (unaccelerated) outbound MAC algorithm
Initialised AES-256 SDCTR (AES-NI accelerated) inbound encryption
Initialised HMAC-SHA-256 (unaccelerated) inbound MAC algorithm
Attempting keyboard-interactive authentication
Using username "user".
Server refused keyboard-interactive authentication
Sent password
Access granted
Access granted. Press Return to begin session.
Opening main session channel
Opened main channel
Started a shell/command
您可以致电Channel.invoke_shell()不打电话Channel.get_pty().
如果它不起作用，那是您的服务器的限制，而不是 JSch 的限制。
而你已经从你之前的问题知道确实如此。
使用 Windows 10 Pro 1903 上的 Win32-OpenSSH 7.7，我可以使用 shell 会话而无需 TTY (-T）没有任何问题：
C:\>echo ipconfig | plink -T username@localhost -pw password
Using username "username".
Microsoft Windows [Version 10.0.18362.356]
(c) 2019 Microsoft Corporation. All rights reserved.
username@COMPUTERNAME C:\Users\username>ipconfig
Windows IP Configuration
Ethernet adapter Ethernet 2:
...
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