Mint 20 to 20.1/20.2/20.3 upgrade
Manual upgrade 20.0 Ulyana to 20.1 Ulyssa
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo apt autoremove
sudo sed -i 's/ulyana/ulyssa/g' /etc/apt/sources.list.d/official-package-repositories.list
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo apt autoremove
sudo /usr/share/ubuntu-system-adjustments/systemd/adjust-grub-title
sudo /usr/lib/linuxmint/mintsystem/mint-adjust.py
#update version number in grub menu
sudo update-grub
#usr merge
sudo apt install usrmerge
sudo apt purge usrmerge
#Possibly required (error when setting display settings)
rm ~/.config/monitors.xml
rm ~/.config/autostart/cinnamon-settings-daemon-xrandr.desktop
reboot
Manual upgrade 20.1 Ulyssa to 20.2 Uma
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo apt autoremove
sudo sed -i 's/ulyssa/uma/g' /etc/apt/sources.list.d/official-package-repositories.list
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo apt autoremove
sudo /usr/share/ubuntu-system-adjustments/systemd/adjust-grub-title
sudo /usr/lib/linuxmint/mintsystem/mint-adjust.py
#update version number in grub menu
sudo update-grub
reboot
Manual upgrade 20.2 Uma to 20.3 Una
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo apt autoremove
sudo sed -i 's/uma/una/g' /etc/apt/sources.list.d/official-package-repositories.list
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo apt autoremove
sudo /usr/share/ubuntu-system-adjustments/systemd/adjust-grub-title
sudo /usr/lib/linuxmint/mintsystem/mint-adjust.py
#update version number in grub menu
sudo update-grub
reboot