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root@kali:~# update-grub2 Generating grub configuration file ... Found theme: /boot/grub/themes/kali/theme.txt using custom appearance settings Found background image: /home/jose/Imágenes/backgroundSea.png Found linux image: /boot/vmlinuz-5.4.0-kali3-amd64 Found initrd image: /boot/initrd.img-5.4.0-kali3-amd64 Found linux image: /boot/vmlinuz-5.3.0-kali3-amd64 Found initrd image: /boot/initrd.img-5.3.0-kali3-amd64 Found linux image: /boot/vmlinuz-5.3.0-kali2-amd64 Found initrd image: /boot/initrd.img-5.3.0-kali2-amd64 Adding boot menu entry for EFI firmware configuration done 

Output of update-grub2

GRUB Version

I'm not sure which version is using it seems like it has both installed.

root@kali:~# grub-install --version grub-install (GNU GRUB 0.97) 

root@kali:~# dpkg -l | grep grub | grep ii ii grub-common 2.04-5kali1 amd64 GRand Unified Bootloader (common files) ii grub-efi-amd64-bin 2.04-5kali1 amd64 GRand Unified Bootloader, version 2 (EFI-AMD64 modules) ii grub-legacy 0.97-75 amd64 GRand Unified Bootloader (Legacy version) ii grub2-splashimages 1.0.1+nmu1 all a collection of great GRUB2 splashimages 

root@kali:~# grub-probe -V grub-probe (GRUB) 2.04-5kali1 

As the title explains I would like to change both of those background images but I was trying without success. What I've tried already:

GRUB

1. Adding GRUB_BACKGROUND=/path/to_image.png to /etc/default/grub
2. Adding the image to /boot/grub
3. Changing /usr/share/desktop-base/kali-theme/grub/grub-16x9.png with the image

LOGIN

Adding the file login-background.png to /usr/share/desktop-base/

As the title explains I would like to change both of those background images but I was trying without success. What I've tried already:

GRUB

1. Added GRUB_BACKGROUND="/home/jose/Imágenes/backgroundSea.png" to /etc/default/grub.

root@kali:~# locate backgroundSea.png /boot/grub/backgroundSea.png /etc/grub.d/backup/boot_grub/backgroundSea.png /home/jose/Imágenes/backgroundSea.png 

Output that shows that the path of the image is correct.

root@kali:~# update-grub Searching for GRUB installation directory ... found: /boot/grub Searching for default file ... found: /boot/grub/default Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst Searching for splash image ... none found, skipping ... Found kernel: /boot/vmlinuz-5.4.0-kali3-amd64 Found kernel: /boot/vmlinuz-5.3.0-kali3-amd64 Found kernel: /boot/vmlinuz-5.3.0-kali2-amd64 Updating /boot/grub/menu.lst ... done 

Ouput of update-grub

2. Adding the image to /boot/grub
3. Changing /usr/share/desktop-base/kali-theme/grub/grub-16x9.png with the image

LOGIN

Adding the file login-background.png to /usr/share/desktop-base/