ruby - postgres error for rails in ubuntu -

i having rails application, , want deploy in new laptop ( ruby , rails installed fresh).

after installing gems , .. when goto rails application folder , ruby rails s

error shows :

/home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:1208:in `initialize': fatal:  role "insane" not exist (pg::error)     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:1208:in `new'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:1208:in `connect'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:326:in `initialize'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `new'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/postgresql_adapter.rb:28:in `postgresql_connection'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:315:in `new_connection'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:247:in `block (2 levels) in checkout'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `loop'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `block in checkout'     /home/insane/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:239:in `checkout'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:102:in `block in connection'     /home/insane/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:101:in `connection'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_specification.rb:171:in `retrieve_connection'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_specification.rb:145:in `connection'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/model_schema.rb:308:in `clear_cache!'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activerecord-3.2.11/lib/active_record/railtie.rb:97:in `block (2 levels) in <class:railtie>'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:418:in `_run__2015430698042624034__prepare__3529665547423141566__callbacks'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:405:in `__run_callback'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:385:in `_run_prepare_callbacks'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:81:in `run_callbacks'     /home/insane/.rvm/gems/ruby-2.1.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/reloader.rb:74:in `prepare!'     /home/insane/.rvm/gems/ruby-2.1.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/reloader.rb:48:in `prepare!'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/application/finisher.rb:47:in `block in <module:finisher>'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/initializable.rb:30:in `instance_exec'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/initializable.rb:30:in `run'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/initializable.rb:55:in `block in run_initializers'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/initializable.rb:54:in `each'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/initializable.rb:54:in `run_initializers'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/application.rb:136:in `initialize!'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/railtie/configurable.rb:30:in `method_missing'     /home/insane/rails/backup/config/environment.rb:5:in `<top (required)>'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `require'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `block in require'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:236:in `load_dependency'     /home/insane/.rvm/gems/ruby-2.1.0/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `require'     /home/insane/rails/backup/config.ru:3:in `block in <main>'     /home/insane/.rvm/gems/ruby-2.1.0/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'     /home/insane/.rvm/gems/ruby-2.1.0/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'     /home/insane/rails/backup/config.ru:in `new'     /home/insane/rails/backup/config.ru:in `<main>'     /home/insane/.rvm/gems/ruby-2.1.0/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval'     /home/insane/.rvm/gems/ruby-2.1.0/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file'     /home/insane/.rvm/gems/ruby-2.1.0/gems/rack-1.4.5/lib/rack/server.rb:200:in `app'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/commands/server.rb:46:in `app'     /home/insane/.rvm/gems/ruby-2.1.0/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app'     /home/insane/.rvm/gems/ruby-2.1.0/gems/rack-1.4.5/lib/rack/server.rb:254:in `start'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/commands/server.rb:70:in `start'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/commands.rb:55:in `block in <top (required)>'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/commands.rb:50:in `tap'     /home/insane/.rvm/gems/ruby-2.1.0/gems/railties-3.2.11/lib/rails/commands.rb:50:in `<top (required)>'     script/rails:6:in `require'     script/rails:6:in `<main>' 

i have gone through below link , dint saying /rails/backup$ createdb insane

createdb: not connect database postgres: fatal: role "insane" not exist (postgresql error) fatal: role "demo" not exist (pg::error)`

please help

you need user in database named insane.

open terminal , following

(the $ , psql> denote terminal type, not commands type)

$ psql template1 psql> create user insane password 'some_password'; 

that should create user you. alternatively, if on dev machine, can use

psql> create user insane superuser; 

that create user insane permissions.

note

you may first need logged in postgres user.

$ sudo su postgres <password account> 

you not see password being typed.

then able use first set of commands above.