Windows 11与Ubuntu Server通过公对公USB线缆连接及文件传输故障求助

Hey there, let's figure out why you're running into this USB issue and get your file transfer sorted out!

First off, the most likely culprit here is the USB cable itself. Not all male-to-male USB cables are built for connecting two computers directly. Most are just standard data/charging cables without a built-in bridge chip — when you plug two computers together with one of these, the USB controllers clash over power and signal, which triggers that Ubuntu error and leaves Windows confused.

Let's walk through the fixes and alternatives step by step:

1. Verify you're using the right cable #

You need a USB transfer/link cable (sometimes called a USB bridge cable). These have a small chip module in the middle (you'll see a little box along the cable) that handles the communication between the two computers' USB ports. Regular male-to-male cables won't work here — even if they're USB 3.0. If you don't have this type of cable, that's probably the root cause.

2. If you do have a proper transfer cable, troubleshoot Ubuntu Server #

• First, update your system and drivers to rule out outdated software:

  sudo apt update && sudo apt upgrade -y
  

• Check if the system detects the cable's bridge chip. Run lsusb before and after plugging in the cable — look for a new device entry (like Prolific, FTDI, or the cable manufacturer's name).
• Check USB kernel modules: Run lsmod | grep usbnet. If there's no output, try loading the module manually with:

  sudo modprobe usbnet
  

• Dig into detailed error logs to get more clues:

  dmesg | grep -i usb
  

  This will show you exactly why the USB port can't enable — maybe the chip isn't supported, or there's a power issue.

3. Windows 11 side setup #

Proper transfer cables usually require companion software on Windows (like the manufacturer's transfer tool or Windows Easy Transfer). Windows doesn't natively support direct USB-to-USB computer connections without this software/driver.

• Check the cable's packaging or manufacturer's docs for the required Windows software.
• Update your Windows USB drivers: Open Device Manager, expand "Universal Serial Bus controllers", right-click each entry, and select "Update driver" → "Search automatically for drivers".

4. Easier alternative methods (no special cable needed) #

If you don't want to mess with specialized cables, there are way simpler network-based transfer options that work reliably:

• Samba Share: Set up a shared folder on Ubuntu that Windows can access directly:
  1. Install Samba: sudo apt install samba -y
  2. Create a shared folder: mkdir ~/my_shared_files
  3. Edit the Samba config: sudo nano /etc/samba/smb.conf and add this at the end (replace your_username with your actual Ubuntu username):

     [ubuntu-share]
         path = /home/your_username/my_shared_files
         browseable = yes
         read only = no
         valid users = your_username
     

  4. Set a Samba password: sudo smbpasswd -a your_username
  5. Restart Samba: sudo systemctl restart smbd
  6. On Windows, open File Explorer and type \\[your-ubuntu-server-ip]\ubuntu-share, then enter your Samba username/password to access the folder.
• SSH/SCP: Use PowerShell or WinSCP on Windows to transfer files over SSH (Ubuntu usually has SSH enabled by default):
  • From Windows PowerShell, send a file to Ubuntu:

    scp C:\path\to\local\file your_username@ubuntu-ip:/path/to/destination
    

  • Pull a file from Ubuntu to Windows:

    scp your_username@ubuntu-ip:/path/to/remote/file C:\path\to\local\destination
    

备注：内容来源于stack exchange，提问作者Lapis