如何将Fedora raw.xz ARM镜像及raw.xz格式系统安装至设备？

Hey there! Raw.xz images are compressed disk images, so they work a bit differently from the bootable ISOs you might be used to—no fancy installer wizard here, we're writing the entire disk image directly to a storage medium. Let's walk through this step by step, covering both your Fedora ARM case and general raw.xz installs.

Step 1: Uncompress the raw.xz Image (If Needed) #

First, we need to get the uncompressed .raw file out of that .xz archive. Open up a terminal and run:

xz -d your-image-file.raw.xz

• Add the -k flag if you want to keep the original .xz file (e.g., xz -dk your-image-file.raw.xz)
• If you're using a GUI tool like Etcher (more on that later), it can handle .xz files directly—no need to manually uncompress!

Step 2: Identify Your Target Storage Medium #

You'll need an SD card (for most ARM devices like Raspberry Pi) or USB drive big enough to hold the uncompressed image. First, find its device path:

1. Plug in your storage medium
2. Run lsblk or sudo fdisk -l in the terminal
3. Look for the device that matches your medium's size (e.g., /dev/sdb for a USB drive, /dev/mmcblk0 for an SD card)

Critical Note: Double-check the device path! If you pick the wrong one, you'll wipe data on another drive. Never use a device path with a number at the end (like /dev/sdb1—that's a partition, not the whole drive).

Step 3: Write the Raw Image to the Storage Medium #

Option A: Command Line (dd) #

This is the standard method for most Linux users. Run this command (replace /dev/sdX with your device path and your-image-file.raw with your uncompressed image):

sudo dd if=your-image-file.raw of=/dev/sdX bs=4M status=progress conv=fsync

• if: Input file (your raw image)
• of: Output device (your storage medium)
• bs=4M: Uses a larger block size to speed up the write
• status=progress: Shows you the write progress (no more guessing!)
• conv=fsync: Ensures all data is written to the drive before the command finishes

Option B: GUI Tool (Etcher) #

If you prefer a point-and-click approach:

1. Download and launch Etcher
2. Select your .raw.xz file (it auto-detects compressed images)
3. Select your target storage medium
4. Click "Flash!" and wait for it to finish

Step 4: Boot from the Storage Medium (ARM-Specific) #

For ARM devices like Raspberry Pi, Odroid, etc.:

1. Eject the storage medium from your computer
2. Plug it into your ARM device
3. Power on the device—you may need to adjust boot settings first:
   • Most ARM devices have a dedicated boot menu key (e.g., F2, Del, or a physical button on the board)
   • Enter the BIOS/UEFI settings and set your storage medium as the first boot option
   • Some devices (like Raspberry Pi) will automatically boot from SD/USB if no internal drive is detected

Key Notes to Avoid Headaches #

• Backup First: Writing the image will erase everything on the target storage medium—make sure you don't have important data there!
• Verify the Image: Always check the SHA256 checksum of your downloaded .xz file against the official Fedora checksum to ensure it's not corrupted.
• ARM Firmware: Some ARM devices may require additional firmware files (e.g., proprietary GPU firmware). Check your device's official docs or the Fedora ARM resources for specifics—most Fedora ARM images include necessary firmware, but it's worth confirming.

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