Kali on USB not booting: [grub]

 If your Kali Linux on a USB drive is not booting and you're encountering a "grub" error, it's likely a bootloader issue. Here are some steps to troubleshoot and potentially resolve the problem:


1. **Recreate the Bootable USB Drive**:

   - Sometimes, issues can occur during the creation of the bootable USB drive. Try recreating the bootable USB drive using a tool like Rufus (for Windows) or dd (for Linux). Make sure to download the Kali Linux ISO from the official website.


2. **Check BIOS/UEFI Settings**:

   - Ensure that your computer is set to boot from USB. Access the BIOS/UEFI settings during startup (usually by pressing a key like F2, F12, or Del) and set the USB drive as the primary boot device.


3. **Secure Boot**:

   - If you're using UEFI, check if Secure Boot is enabled. Some Linux distributions may have issues with Secure Boot. You may need to disable it in your BIOS/UEFI settings.


4. **Try Different USB Port**:

   - Sometimes, using a different USB port can resolve boot issues.


5. **Check for Corrupted ISO**:

   - Verify that the Kali Linux ISO you downloaded isn't corrupted. You can compare the checksum of the ISO with the one provided on the official Kali Linux website to ensure it's intact.


6. **Reinstall GRUB**:

   - If you see a "grub" error, it may be a GRUB bootloader issue. Boot into the live environment using the USB, open a terminal, and reinstall GRUB using commands like `grub-install` and `update-grub`.


7. **Use a Different Bootloader**:

   - If GRUB continues to cause problems, you might consider using a different bootloader, like LILO or rEFInd.


8. **Try Legacy Boot Mode**:

   - If your computer supports both UEFI and legacy boot modes, try switching to legacy mode and see if that allows your USB to boot.


9. **Test on Another Computer**:

   - Test the USB drive on another computer to determine if the issue is specific to your hardware.


10. **Check USB Drive Health**:

    - Ensure that the USB drive is not failing. You can use tools like GParted or Disks in Linux to check the drive's health.


If you've tried all these steps and the issue persists, it's possible that there's a compatibility problem with your specific hardware or an issue with the USB drive itself. You may want to seek help from the Kali Linux community or consider alternative installation methods, such as using a different USB drive or creating a persistent installation on a different USB drive.

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