I have tried to configure the open project in ubuntu 18.04 , by following steps,

Create and configure the database configuration file in config/database.yml (relative to the openproject-directory.

[dev@debian]# vim config/database.yml

Now edit the config/database.yml file and insert your database credentials. It should look like this (just with your database name, username, and password):

default: &default
  adapter: postgresql
  encoding: unicode
  host: localhost
  username: openproject
  password: openproject-dev-password

development:
  <<: *default
  database: openproject_dev

test:
  <<: *default
  database: openproject_test

I have a copied the following content and pasted in the  vim edit , but the problem is not able to write and execute  ,i have attached the screenshot of the terminal below and Please suggest me the idea for the following problem for this ,

Thanks in Advance ..