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I would like to change this default ubuntu logo. The logo of the checking disk.

enter image description here

But I can't find it. I tried to change:

/usr/share/plymouth/ubuntu-logo.png
/usr/share/plymouth/themes/spinner/watermark.png

The first is the login screen logo while the second is the "normal" boot logo.

Do you know if this is a different image or do you know how to solve this problem?

1

UBUNTU 20.04

the live iso uses the file initrd which is inside casper directory.

enter image description here

this initrd file has the plymouth theme inside it, this is used for booting live iso. you can extract the contents and see what is being used for plymouth or any other config.

copy the initrd file to new directory.. and run

unmkinitramfs initrd .

enter image description here

enter image description here

So Editing the Plymouth contents as you wish and then recompile the new initrd file say myinitrd and use it to boot live iso instead of standard initrd file.

how to recompile the initrd to say myinitrd is a big task for me, I have offered two bounties in stackoverflow and unix & linux

Finally I got the answer from a smart person.. https://superuser.com/q/1556241/976939

the script is something like this..

#!/bin/bash

#mkdir 18
#unmkinitramfs initrd $HOME/18

# start with an empty file
touch $HOME/myinitrd

# Add the first microcode firmware
cd $HOME/18/early
find . -print0 | cpio --null --create --format=newc > $HOME/myinitrd

# Add the second microcode firmware
cd $HOME/18/early2
find kernel -print0 | cpio --null --create --format=newc >> $HOME/myinitrd

# Add the actual ram fs file system
cd $HOME/18/main
find . | cpio --create --format=newc | xz --format=lzma >> $HOME/myinitrd

# verify both initrds are the same
# binwalk $HOME/myinitrd
# binwalk $HOME/initrd

I confirm that using this method I have successfully customized the live iso Plymouth theme for the Ubuntu 20.04 ISO.

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