Installing
2. Setting Up PostgreSQL 13 Repo
How to Add PostgreSQL 13 Linux Elementary OS Apt Repository
3. Installing PostgreSQL 13
Then to Install PostgreSQL 13 for Elementary OS
Simply play:sudo apt install postgresql-13
To get installed also the Client programs add:
sudo apt install postgresql-client-13
Again to Search for other gears:
sudo apt search postgresql-13
If Got “User is Not in Sudoers file” then see: How to Enable sudo