Home / ubuntu / Questions / 1098625
In Process
Utpal Sarkar
Asked: 2018-12-06 03:39:08 +0800 CST

Ubuntu Error 15:(http://grub4dos.chenall.net/e/15) File not found

  • 772

Recently I just downloaded Ubuntu-18.10-desktop-amd64 and make a bootable USB by universal usb installer. But when I boot this on my laptop it's showing following errors :

Booting 'Boot ubuntu-18.10-desktop-amd64'

(hd0,0)
Filesystem type is iso9660_Joliet, using whole disk [Linux-bzImage, setup=0x4200, size=0x821b58]
initrd /casper/ILUG

Error 15:(http://grub4dos.chenall.net/e/15) File not found

Press any key to continue...

How can I solve this?

boot usb-installation grub4dos 18.10

1 Answers

  1. For CDFS, make sure menu.lst case references are UPPERCASE

    I got this error when attempting to boot from a USB drive that had been set bootable, made with the Universal USB Installer. During boot, I got the Error 15 message.

    I had downloaded the Ubuntu ISO image (18.04.3 LTS), and the file name was in lowercase (ubuntu-18.04.3-desktop-amd64.iso).

    I used the Universal USB Installer tool to burn the image (also see caveat).

    When I booted, I got the Error 15 message. With some research, it seems that the CDFS file system is case sensitive.

    To remedy, I inserted the USB drive into my Windows PC, and navigated to the \boot\grub\menu.lst file, and edited it, changing all instances of:

    UBUNTU-18.04.3-DESKTOP-AMD64      ➜  UBUNTU-18.04.3-DESKTOP-AMD64
UBUNTU-18.04.3-DESKTOP-AMD64.ISO  ➜  UBUNTU-18.04.3-DESKTOP-AMD64.ISO

    I also updated the ISO image filename in the root directory on the USB drive to be uppercase:

    \UBUNTU-18.04.3-DESKTOP-AMD64.ISO

    After these changes were made, I rebooted via USB, and it worked.

    My final menu.lst looked like this:

    # This Menu created with Universal USB Installer https://www.pendrivelinux.com
default 0
timeout 30
color NORMAL HIGHLIGHT HELPTEXT HEADING
foreground=FFFFFF
background=000000

title Boot UBUNTU-18.04.3-DESKTOP-AMD64
set ISO=/UBUNTU-18.04.3-DESKTOP-AMD64.ISO
set CASPER=/casper-rw
find --set-root %ISO%
map %ISO% (0xff)
#CLUG
map --hook
root (0xff)
kernel /casper/vmlinuz file=/preseed/ubuntu.seed noprompt boot=casper iso-scan/filename=%ISO% quiet --
initrd /casper/initrd

title Boot UBUNTU-18.04.3-DESKTOP-AMD64 acpi=off
set ISO=/UBUNTU-18.04.3-DESKTOP-AMD64.ISO
set CASPER=/casper-rw
find --set-root %ISO%
map %ISO% (0xff)
#CLUG
map --hook
root (0xff)
kernel /casper/vmlinuz file=/preseed/ubuntu.seed noprompt boot=casper iso-scan/filename=%ISO% quiet acpi=off --
initrd /casper/initrd
    • 0