如何用os.system实现跨平台SSH后台连接？Windows替代/dev/null方案

Got it, let's fix this for Windows while keeping your original workflow with os.system(). The main differences are replacing Linux's /dev/null and adjusting how we run the command in the background—here's how to do it:

The Modified Command for Windows #

Instead of relying on /dev/null and & (which don't work the same in Windows CMD), we'll use Windows-native tools:

import os
os.system('start /B ssh -o StrictHostKeyChecking=no -o ServerAliveInterval=60 -R test:80:127.0.0.1:80 serveo.net > data.txt 2> NUL')

Breakdown of Changes: #

• start /B: This is Windows CMD's way to run a command in the background. It prevents a new command prompt window from popping up and ensures your Python program can continue executing without waiting for the SSH tunnel to finish.
• 2> NUL: NUL is Windows' equivalent of Linux's /dev/null—it discards all error output, just like your original command did with 2> /dev/null.
• Standard Output: We keep > data.txt to log the Serveo output exactly as you did in Linux.

Key Notes #

• Make sure ssh is available in your Windows PATH: You can install Windows' native OpenSSH via Settings > Apps > Optional features, or use the SSH included with Git Bash. If it's not in PATH, specify the full path to ssh.exe (e.g., C:\\Program Files\\OpenSSH\\ssh.exe).
• Test first without backgrounding: To debug, run the SSH command directly in CMD (without start /B) to confirm it connects to Serveo properly before adding the background and redirection.
• No extra dependencies: This uses only built-in Windows CMD features, so you don't need to install anything beyond SSH.

内容的提问来源于stack exchange，提问作者Ilan Kalendarov