下载Ubuntu前如何指定配置以适配无网i686老旧电脑？

Got it, let's sort this out for you. The root problem here is that you grabbed the default 64-bit (amd64) Ubuntu image, which won’t run on your old i686 (32-bit) machine. Here’s exactly how to get the right version and get it installed:

Step 1: Choose the Right 32-bit Ubuntu Variant #

Modern Ubuntu Desktop no longer offers official 32-bit builds, but you have two solid options tailored for i686 hardware:

• Ubuntu Server i386: If you don’t need a graphical desktop, this is the official supported 32-bit release from Ubuntu. It’s lightweight and perfect for headless setups or if you plan to add a desktop environment later.
• Lightweight Ubuntu Flavors: Distros like Lubuntu or Xubuntu still maintain 32-bit desktop builds. These are ideal for old, low-spec i686 machines because they use far fewer system resources than the standard Ubuntu Desktop.

Step 2: Download the Correct i386 Image #

On your 64-bit computer, navigate to Ubuntu’s official download section (or the download page for your chosen flavor). Look for the i386 (sometimes labeled "32-bit") download option—skip anything marked amd64 (that’s the 64-bit version you downloaded before).

Crucially, make sure you download the full offline image (not the network installer). Since your old machine has no internet, this ensures all necessary installation files are included on the disc/USB, so you won’t run into missing package errors mid-setup.

Step 3: Write the Image to Disc/USB #

Use the same tool you used before (like Rufus, Etcher, or the dd command in Linux/macOS) to write the i386 image to your optical disc or USB drive. Double-check that you’re selecting the new i386 image, not the old amd64 one.

Step 4: Boot and Install on Your i686 Machine #

Insert the disc/USB into your old computer, boot from it, and follow the installation prompts. Since you’re using the correct 32-bit kernel now, you won’t get the compatibility error anymore.

内容的提问来源于stack exchange，提问作者Mike Frizell