Upgrade to Postgres 16

[lmacielvieira]

Backup before install

pg_dump -h <host> -U <user_name> -d <database> -Fd -j 4 -f backup_directory > backup.log &

Remove older installed versions

sudo apt remove —purge postgresql-15 postgresql-client-15 postgresql-doc-15
sudo systemctl stop postgresql
sudo apt-get --purge remove postgresql-9.5
sudo apt autoremove

Install PostreSQL 16

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-get update
sudo apt-get install postgresql-16 postgresql-client-16 postgresql-doc-16
sudo systemctl start postgresql@16-main
sudo systemctl enable postgresql@16-main

Set user before restore backup

sudo -u postgres psql
CREATE USER <user>;
ALTER ROLE <user> WITH SUPERUSER;
ALTER ROLE <user> CREATEDB;
ALTER ROLE <user> CREATEROLE;
ALTER ROLE <user> LOGIN;
CREATE DATABASE <db> OWNER <user>;
\q

Change settings

*ask me for further details
sudo systemctl reload postgresql

Restore backup

pg_restore -h <host> -U <user> -d <db> -j 4 -Fd backup_directory