My Ubuntu won't boot.

Hello,

The external drive allows you to launch the Ubuntu image and choose to start Ubuntu in Live mode or to install it on the destination disk: if the next day you have nothing, it means you chose the first option and then rebooted to something else or that you selected an apparently empty or non-bootable disk in the boot options instead of specifying your SSD if it is bootable.

Hello. So I should reinstall using a different option than the one I chose, which I believe was the first one. I will review that, and I'll keep you updated. I will put the DVD back in with the image of the ISO on it, and start over differently. Thank you.

Hello,

The message you saw appears when the disk that your BIOS is trying to boot from is not bootable. As Brucine suggested, I think the first time you only booted Ubuntu in live USB mode. If you continue to boot from your USB stick while it is not plugged in (or if the plugged USB stick is not bootable), then the message you're seeing is normal.

To solve your problem, you need to install Linux on your hard drive (on dedicated partitions) and at the end of the installation, install Grub on the hard drive that your BIOS will boot from. If you then restart by booting from this hard drive, Grub should appear and allow you to launch one of the operating systems installed on your hard drive.

Also, if your BIOS has a secure boot, I encourage you to read this page. I think that nowadays, you should be able to install Ubuntu directly without having to disable secure boot (to be verified). If that is not the case, you can:

1. Restart and enter the BIOS to disable secure boot.
2. Restart and boot from your USB stick to install Linux (without secure boot).
3. Remove the USB stick, restart under Ubuntu, and install the following package to register Ubuntu in your EFI partition:

sudo apt update sudo apt install grub-efi-amd64-signed

4. Restart and enter the BIOS to re-enable secure boot.
5. Restart normally, as you should now be able to launch Ubuntu with secure boot.

Good luck

Hello.

Thank you very much for paying attention to me. Things are different. The situation you are describing is not mine. I do not have a USB key. I had the 22.04 etc. that I told you about on DVD. I attempted the installation with option 1 out of the 4 proposed. I was suggested that this might be where the error was. I started over and reinstalled with option 2. A descriptive line where the word 'graphical' appears. I reached the same screen. And there I saw, which might have already been the case before, I do not remember, that there was a folder in the top left offering installation. It was at that moment that we probably install it on the hard drive. I wanted to do it. However, I realized that it was suggesting to do it 'to each their own' I would say on one of my hard drives. The 240 GB SSD or the other. It did not allow for partitioning, I would say. And I noted the possibilities, but I do not know how much space I should allocate for each one. Because I do not want to make unnecessarily large divisions. Here is the description I saw among the possibilities:

'Journaling file system ext 4

'Journaling file system ext 3

'File system ext 2

'Journaling file system btrfs

'Journaling file system jfs

'Journaling file system xfs

'Files Fat 16

'Files Fat 32

'Swap space

'Reserved area for the BIOS boot loader

Then 3 lines appeared

/dev/sda

Free space 240 GB

/dev/sbd

So before coming to ask questions, I tried to look for myself in the forums so as not to disturb people unnecessarily, and also in a book about Linux, which in my opinion contained everything. But there you go, since I bought it, things have changed... just like what I read on the forums.

The book is the Student Edition, Linux Campus Press by Jack Tackett and Steven Burnett. It's a heavy and large book of almost 700 pages. I thought I would find how to partition my disks without making mistakes in the megabytes allocated to each partitioning. But almost nothing informs me about this. It is poorly indicated. So what should I do? Let the automatic installation do this for me, and use up all my disk, which may not allow me to put documents and videos from other operating systems? I specify that I have nothing on my computer except for two disks. One is a 240 GB empty SSD and the other is a 164 GB which has no system on it, but may have some Linux documents. The first is empty, and one could say that the second can be formatted. Although I do not know how to go about it if it is necessary. Thank you.

Hello.

You're very kind. Sorry for this late reply, I wasn't here. Thank you very much and have a great weekend.