pgsql

$ PGPASSWORD=<password> psql -h 192.168.1.29 -p 5432 -U postgres -d postgres
psql (12.12 (Ubuntu 12.12-0ubuntu0.20.04.1), server 15.1)
Type "help" for help.

postgres=#

postgres=# \du
                                      List of roles
    Role name    |                         Attributes                         | Member of
-----------------+------------------------------------------------------------+-----------
 postgres        | Superuser, Create role, Create DB, Replication, Bypass RLS | {}
 repmgr          | Superuser, Replication                                     | {}

postgres=#

postgres=# \l
                                      List of databases
    Name     |  Owner   | Encoding |   Collate   |    Ctype    |      Access privileges
-------------+----------+----------+-------------+-------------+------------------------------
 postgres    | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
 repmgr      | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
 template0   | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres                 +
             |          |          |             |             | postgres=CTc/postgres
 template1   | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres                 +
             |          |          |             |             | postgres=CTc/postgres
(4 rows)

postgres=# \dn
      List of schemas
  Name  |       Owner
--------+-------------------
 public | pg_database_owner
(1 row)

postgres=#

postgres=# \o out.txt

postgres=# \setenv PAGER 'less -S'
postgres=# \pset pager off
postgres=# \pset pager on

PAGER="less -S" psql -U postgres -d postgres