List the databases in a PostgreSQL instance

I don’t feel like installing.https://www.pgadmin.org/[pgAdmin] ou phppgadmin while everything is present on the command line.
For that we need to launch the terminal and log in as the postgres user.
The postgres user is the only one who by default has the right to launch the psql application, which is the command-line client. </think>CLI) postgresql,
to be able to talk to the database from the command line in the terminal
To connect, launch the terminal and type this:

To connect and go directly to the PostgreSQL command prompt, type this:

To list the databases of a PostgreSQL instance, here is the command:

result:

List of databases Name | Owner | Encoding | Collation | Character Type | Access Privileges

fiber | tech | UTF8 | fr_FR.UTF-8 | fr_FR.UTF-8 | =Tc/tech
| | | | | tech=CTc/tech fiberdev | tech | UTF8 | fr_FR.UTF-8 | fr_FR.UTF-8 | =Tc/tech
| | | | | tech=CTc/tech fiberweb | tech | UTF8 | fr_FR.UTF-8 | fr_FR.UTF-8 | =Tc/tech
| | | | | tech=CTc/tech postgres | postgres | UTF8 | fr_FR.UTF-8 | fr_FR.UTF-8 | template0 | postgres | UTF8 | fr_FR.UTF-8 | fr_FR.UTF-8 | =c/postgres
| | | | | postgres=CTc/postgres template1 | postgres | UTF8 | fr_FR.UTF-8 | fr_FR.UTF-8 | =c/postgres
| | | | | postgres=CTc/postgres (6 lines)

type q to exit the results display

to list the schemas of a postgresl instance

result

public information_schema pg_catalog pg_toast_temp_1 pg_temp_1 pg_toast (6 lignes)

ou

result

pg_toast pg_temp_1 pg_toast_temp_1 pg_catalog information_schema public (6 lines)