https://github.com/blobmon/simplechan
ユーザーでデータベースに入りたいのですが、入れません。

Now, once you are back again being the normal, default user, cd into /sql/ directory in Simplechan repository. We are going to create tables and functions now.
Try opening psql with the latest created db and role. In my default case, I try opening psql with simplech_db and simplech_role.

$psql -d simplech_db -U simplech_role

Create tables by importing those sql files now. Type these commands...

\i create_table_query.sql
\i functions.sql
\i functions_moderator.sql

Make sure those sql statements were imported and executed without errors. If there are errors, make sure to fix them. I think an error might come when you type \i create_table_query.sql with extension uuid-ossp. It can be easily fixed by installing some extra postgres package. Any other error you might encounter, should be easily fixable.

個々の部分ができません。ユーザーからデータベースに入って、tableを作り、sqlファイルを作りたいので、そこまで手順を教えてください。
ちなみに、「simplech_db and simplech_role.」←これはvirtualbox内のLinuxじょうでやるんですか？それとも、SQL　Shell上で行うのですか？