Question

I try dropdb mydbname in shell. It do not give any error. But still when I call \l it is still there.

I logged into the postgres server using sudo -u postgres psql.

Other than my main concern I need to know how to go into the database other than just staying outside of it. (as a example if I want to list the tables)

Answer 1

In order to drop database you can use SQL command (but I do not understand why dropdb didn’t work) DROP DATABASE mydbname:

sudo -u postgres psql -c "DROP DATABASE mydbname"

It would be good to check if database is not used:

select * from pg_stat_activity where datname = 'mydbname';

The sudo -u postgres psql connects to postgres database. You need to specify database: sudo -u postgres psql mydbname and then you can use metdata commands like \d, \dt, \dv, …