预装Ubuntu镜像的下载/安装/配置及戴尔专属镜像重装咨询

Hey there, let's tackle your two questions one by one — I've dealt with both scenarios before, so here's what works:

If you're referring to setting up the official Ubuntu build (the "pre-installed" equivalent you can use on any hardware), follow these steps:

Download the Image #

• Pick your preferred Ubuntu version: LTS (Long-Term Support) releases like 22.04 or 24.04 are best for stability. Head to the official Ubuntu download page to grab the Desktop ISO.
• Verify the ISO's integrity to avoid corrupted installs: Download the matching SHA256 checksum file, then run this command in your terminal (Linux/macOS) or use a checksum tool (Windows):

  sha256sum -c SHA256SUMS 2>&1 | grep OK
  

  You should see a line confirming the ISO is valid.

Create a Bootable USB #

• Grab a USB drive of at least 4GB (back up all data first — it'll be wiped clean).
  • On Windows: Use Rufus (a free, lightweight tool) to flash the ISO to your USB.
  • On Linux/macOS: Use the dd command (replace /path/to/ubuntu.iso with your ISO's location and /dev/sdX with your USB device ID — check with lsblk to avoid overwriting your main drive):

    sudo dd if=/path/to/ubuntu.iso of=/dev/sdX bs=4M status=progress
    

Install Ubuntu #

• Plug in the USB, restart your computer, and press the boot menu key (usually F12, Esc, or F2 — varies by manufacturer) to select the USB as your boot device.
• Follow the on-screen wizard: Choose your language, keyboard layout, and installation type ("Erase disk and install Ubuntu" is simplest for new setups, or use custom partitioning if you need dual-boot). Finish by setting your timezone, username, and password.

Post-Install Configuration #

• First, update your system to get the latest patches:

  sudo apt update && sudo apt upgrade -y
  

• Install hardware-specific drivers: Open Software & Updates, go to the Additional Drivers tab. The system will scan for proprietary drivers (like NVIDIA graphics or Wi-Fi adapters) — select the recommended one and click "Apply Changes".

I feel your pain — Dell no longer hosts pre-built Ubuntu ISOs for most models directly on their website. But here are two reliable workarounds:

Option 1: Create a Dell Recovery Drive (If Your System Still Boots) #

• Dell pre-installs a Dell Recovery & Restore tool on their Ubuntu machines. Open it from the applications menu, follow the prompts to create a bootable recovery USB. This drive includes the exact Ubuntu build that came with your laptop/desktop, plus all Dell-specific drivers and firmware.
• Once the USB is ready, use it to boot your system and follow the recovery wizard to reset to factory state.

Option 2: Install Standard Ubuntu + Add Dell Drivers (If System Won't Boot) #

If you can't access the recovery tool, install the standard Ubuntu ISO (from step 1) and then add Dell's official drivers manually:

1. Add Dell's software repository to your system:

   echo "deb http://dell.archive.canonical.com/updates/ $(lsb_release -cs) dell" | sudo tee /etc/apt/sources.list.d/dell.list
   

2. Import the repository's GPG key to verify packages:

   sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F9FDA6BED73CDC22
   

3. Update your package list and install Dell's management tools + drivers:

   sudo apt update && sudo apt install dell-command-configure dell-system-update -y
   

4. Run dell-system-update in the terminal — it will scan your hardware and install all Dell-specific drivers, firmware, and utilities that match your model.

Backup First! #

No matter which method you use, back up all important data before starting — reinstalling will wipe your system drive.

内容的提问来源于stack exchange，提问作者AlikElzin-kilaka