sudo sed -i 's/una/vanessa/' /etc/apt/sources.list
sudo sed -i 's/una/vanessa/' /etc/apt/sources.list.d/official-package-repositories.list 
sudo sed -i 's/focal/jammy/' /etc/apt/sources.list.d/official-package-repositories.list 
sudo apt update
sudo apt upgrade
sudo dpkg -i --force-overwrite /var/cache/apt/archives/casper_1.470_amd64.deb 
sudo apt upgrade
sudo apt-get dist-upgrade
sudo apt autoremove
sudo apt-get install perl
sudo apt-get dist-upgrade
sudo apt autoremove
sudo sed -i 's/focal/jammy/' /etc/apt/sources.list.d/*.list 
sudo apt upgrade
sudo apt-get dist-upgrade
sudo apt-get install gvfs-fuse gvfs-backends
sudo apt-get install samba-common-bin samba-libs
sudo apt-get install python3-samba python3-uno
sudo apt-get install nemo-share picard libsmbclient
sudo apt-get install libreoffice libreoffice-script-provider-python
sudo apt-get install kodi
sudo cp /etc/apt/trusted.gpg /etc/apt/trusted.gpg.d
sudo /usr/share/ubuntu-system-adjustments/systemd/adjust-grub-title 
sudo /usr/lib/linuxmint/mintsystem/mint-adjust.py
sudo update-grub
sudo reboot

conf files

/etc/sleep.conf
/etc/mime.types
/etc/ssh/ssh_config

Config changes required after upgrade:
- touchpad enable tap to click
- don't change monitor scale to fraction (125%) but change display resolution instead. Monitor scaling does not work with all apps, particularly not with keepass2/mono.

sudo sed -i 's/vanessa/vera/' /etc/apt/sources.list
sudo sed -i 's/vanessa/vera/' /etc/apt/sources.list.d/official-package-repositories.list 
sudo apt update
sudo apt upgrade
sudo apt-get dist-upgrade
sudo apt autoremove
sudo /usr/share/ubuntu-system-adjustments/systemd/adjust-grub-title 
sudo /usr/lib/linuxmint/mintsystem/mint-adjust.py
sudo update-grub
sudo reboot