How to solve the issue of not being able to find the installation disc image in Ubuntu installation.

If you’re unable to locate the disk image during Ubuntu installation, you can try the following solution:

1. Firstly, make sure your image file is intact and not corrupted. You can download a new image file and verify its integrity using checksum.
2. If you are using a CD to install, check for any damage or dirt on the CD. You can try using a different CD or use a USB for installation.
3. If you are using a USB installation, make sure the USB drive is connected properly and not damaged. Try inserting the USB drive into another USB port or using a different USB drive.
4. Make sure the boot sequence of your computer is configured correctly. In the BIOS settings, set the CD drive or USB drive as the preferred boot device.
5. If your computer is using UEFI boot mode, try switching to the traditional BIOS boot mode. In the BIOS settings, change the boot mode from UEFI to the traditional BIOS mode.

If you still can’t find the disk image, it could be an issue with your CD drive or USB drive, or a hardware compatibility problem. You can try installing on a different computer, or consider using another distribution of the Linux operating system.