如何更新Ubuntu安装U盘？能否获取更新版Ubuntu 17.10.1安装ISO？

Hey there, let's tackle each of your questions step by step to get you sorted out:

1. Is there an updated Ubuntu 17.10.1 ISO with all latest patches? #

Unfortunately, Canonical doesn’t release updated ISOs for end-of-life (EOL) Ubuntu versions like 17.10.1. Once a version reaches EOL, official support stops, and no pre-patched ISOs are published.

If you still need to use 17.10.1, your options are:

• Use the original 17.10.1 ISO, install the system, then run the 250MB update as you discovered. Just note you’ll need to switch your system’s software sources to Ubuntu’s old releases archive first (since regular sources are no longer active for EOL versions).
• Build a custom ISO with pre-integrated updates yourself:
  • Mount the original ISO to a local directory
  • Copy all its contents to a working folder
  • Update the sources.list file in the copied filesystem to point to the old releases archive
  • Chroot into the copied filesystem and run apt update && apt upgrade
  • Generate a new ISO using tools like mkisofs

That said, I’d strongly recommend upgrading to a supported LTS version (like 18.04 or later) since 17.10 no longer receives security updates.

2. Fixing WiFi not working after installation #

Since your issue links to Broadcom drivers, here’s what to try after completing the system update:

• First, confirm your WiFi adapter model with this terminal command:

  lspci | grep Network
  

• Install the official Broadcom driver package:

  sudo apt install bcmwl-kernel-source
  

• Reboot your system after installation. This should fix the driver-switching bug you encountered (where selecting "Using Broadcom..." reverted back to "Do not use this device").
• If the problem persists, purge any conflicting driver files first:

  sudo apt purge bcmwl-kernel-source
  sudo apt autoremove
  sudo apt install bcmwl-kernel-source
  

  Reboot again to apply changes.

3. How to update your Ubuntu installation USB drive #

Updating an existing installation USB for an EOL version like 17.10 is a bit involved, but here are two reliable approaches:

Option 1: Create a custom updated ISO and reflash the USB #

Once you’ve built your custom ISO with all updates (as outlined in question 1), write it to your USB drive using the dd command (replace /dev/sdX with your USB device name—double-check this to avoid overwriting your hard drive):

sudo dd if=custom_17101.iso of=/dev/sdX bs=4M status=progress

If you prefer a GUI, tools like Etcher work well too.

Option 2: Update the USB’s filesystem directly (advanced) #

• Mount the USB’s system partition to your local machine
• Edit the sources.list file on the USB to use the old releases archive
• Chroot into the mounted partition and run apt update && apt upgrade
• Safely unmount the partition

This method is more complex and carries a higher risk of breaking the bootable USB, so the first option is usually safer.

内容的提问来源于stack exchange，提问作者Meky