====== Upgrade to 17 ======

<code bash>
sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo apt update
</code>

<code bash>
apt install postgresql-17
pg_upgradecluster 15 main

Success. Please check that the upgraded cluster works. If it does,
you can remove the old cluster with
    pg_dropcluster 15 main

</code>