ALGUMAS PPA's ÚTEIS.

GRUB CUSTOMIZE.

1. sudo add-apt-repository ppa:danielrichter2007/grub-customizer
2. sudo apt-get install grub-customizer

REMOVER O GRUB.

1. sudo add-apt-repository ppa:danielrichter2007/grub-customizer --remove
2. sudo apt-get remove grub-customizer
3. sudo apt-get autoremove

TEMA PARA O GRUB:

1. wget "https://drive.google.com/uc?export=download&id=0B1tVpdpC9bZDLWxKVHBMQWRXU0U" -O grub-themes-vimix.deb
2. sudo dpkg -i grub-themes-vimix.deb
3. sudo apt-get install -f

OUTROS TEMAS:

1. https://www.gnome-look.org/browse/cat/109/page/1/ord/latest/

BURG, substituto ao Grub.

1. sudo add-apt-repository -y ppa:n-muench/burg
2. sudo apt-get update
3. sudo apt-get install burg burg-themes

BOOT REPAIR.

1. sudo add-apt-repository ppa:yannubuntu/boot-repair
2. sudo apt-get update 
3. sudo apt-get install boot-repair

LIBREOFFICE.

1. sudo add-apt-repository -y ppa:libreoffice/ppa
2. sudo apt-get update
3. sudo apt-get install libreoffice libreoffice-style-breeze

SE Mais tarde, for necessário desinstalar o programa, use os comandos abaixo;

1. sudo apt-get remove libreoffice
2. sudo apt-get autoremove

WINUSB, para ubuntu 16.04 e seus derivados.

1. sudo add-apt-repository ppa:nilarimogard/webupd8
2. sudo apt-get update
3. sudo apt-get install winusb

QBITORRENT STABLE.

sudo add-apt-repository ppa:qbittorrent-team/qbittorrent-stable