Tiago Earth's questions

i did some edit on Ubuntu 24.10 following this question and this question

I edited grub with sudo nano /etc/default/grub following by the command sudo update-grub

The edit was:

GRUB_DEFAULT=saved
GRUB_SAVEDEFAULT=true
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`( . /etc/os-release; echo ${NAME:-Ubuntu} ) 2>/dev/null || ec>
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

After I rebooted the system the boot menu or grub menu didn't appear and it went straight to Ubuntu 24.10. Now I cannot log in to my other operating system. I don't know what I did wrong. What can I do so that the grub boot menu appears again from which I can choose the operating system that I want to use?

I recently tested manjaro gnome edition, and after installing the boot or grub not sure what it is the page when we turn on the computer an select the operating system. i like it better than the default from ubuntu. I have ubuntu 24.04

I think is better the manjato boot page because the letters are bigger and is centered, and have a nice image, that possibly is on ubuntu. And after shutdown the computer or restart, the computer log to the last operating system what can be convinent.

And so have a better presentation and works better.

I want to install the same boot or grub mechanism on my laptop but dont know the name or if actually the same mechanism exists on ubuntu. Can anyone tell me if there exists on ubuntu ? and if so what is the name and possibly tell me how to install it.(if i can use synaptic i just need to type the name, because i already install synaptic)

The new Ubuntu 24.04 has been release but I can't upgrade the system using the update manager, because nothing appears. I have Ubuntu 23.10. I tried to change to long term releases and back to any version to no avail.

I don't know what I can do to upgrade beside installing again.

Is there a command I can use upgrade to Ubuntu 24.04 from Ubuntu 23.10 ?

I fresh installed Ubuntu 23.10 after I couldn't upgrade from 23.10. Now I want to install Safing (Portmaster) in Ubuntu 23.10, but the App Center is not able to install Safing. How can I install Safing by using or not using the App Center?

I clicked the .deb file that I downloaded from the official Safing website to try to install the app, but the App Center was not able to install the Safing .deb file.

And is the app center will get fix so people can install apps like safing, using the app center?