Como você instalou o Dradis? O guia de instalação aqui deve ajudá-lo a funcionar: link
Temos outros usuários em execução no Ubuntu: link deixe-nos saber se você continuar correndo em problemas!
=> Booting WEBrick
=> Rails 4.1.9 application starting in production on http://0.0.0.0:443
=> Run 'rails server -h' for more startup options
=> Notice: server is listening on all interfaces (0.0.0.0). Consider using 127.0.0.1 (--binding option)
=> Ctrl-C to shutdown server
Exiting
/home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/application/configuration.rb:105:in 'database_configuration': Cannot load 'Rails.application.database_configuration': (RuntimeError)
Could not load database configuration. No such file -
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-4.1.9/lib/active_record/railtie.rb:126:in 'block (2 levels) in <class:Railtie>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/lazy_load_hooks.rb:38:in 'instance_eval'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/lazy_load_hooks.rb:38:in 'execute_hook'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/lazy_load_hooks.rb:45:in 'block in run_load_hooks'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/lazy_load_hooks.rb:44:in 'each'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/lazy_load_hooks.rb:44:in 'run_load_hooks'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-4.1.9/lib/active_record/base.rb:326:in '<module:ActiveRecord>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-4.1.9/lib/active_record/base.rb:23:in '<top (required)>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:247:in 'require'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:247:in 'block in require'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:232:in 'load_dependency'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:247:in 'require'
from /home/nitesh/dradis-git/server/engines/core/app/models/dradis/core/log.rb:3:in '<module:Core>'
from /home/nitesh/dradis-git/server/engines/core/app/models/dradis/core/log.rb:2:in '<module:Dradis>'
from /home/nitesh/dradis-git/server/engines/core/app/models/dradis/core/log.rb:1:in '<top (required)>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:247:in 'require'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:247:in 'block in require'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:232:in 'load_dependency'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:247:in 'require'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:348:in 'require_or_load'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:480:in 'load_missing_constant'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:180:in 'const_missing'
from /home/nitesh/dradis-git/server/config/initializers/z_01_clear_transient_data.rb:5:in '<top (required)>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:241:in 'load'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:241:in 'block in load'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:232:in 'load_dependency'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/dependencies.rb:241:in 'load'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/engine.rb:648:in 'block in load_config_initializer'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-4.1.9/lib/active_support/notifications.rb:161:in 'instrument'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/engine.rb:647:in 'load_config_initializer'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/engine.rb:612:in 'block (2 levels) in <class:Engine>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/engine.rb:611:in 'each'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/engine.rb:611:in 'block in <class:Engine>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/initializable.rb:30:in 'instance_exec'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/initializable.rb:30:in 'run'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/initializable.rb:55:in 'block in run_initializers'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:228:in 'block in tsort_each'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:350:in 'block (2 levels) in each_strongly_connected_component'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:422:in 'block (2 levels) in each_strongly_connected_component_from'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:431:in 'each_strongly_connected_component_from'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:421:in 'block in each_strongly_connected_component_from'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/initializable.rb:44:in 'each'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/initializable.rb:44:in 'tsort_each_child'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:415:in 'call'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:415:in 'each_strongly_connected_component_from'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:349:in 'block in each_strongly_connected_component'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in 'each'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in 'call'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in 'each_strongly_connected_component'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:226:in 'tsort_each'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:205:in 'tsort_each'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/initializable.rb:54:in 'run_initializers'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/application.rb:300:in 'initialize!'
from /home/nitesh/dradis-git/server/config/environment.rb:5:in '<top (required)>'
from /home/nitesh/dradis-git/server/config.ru:3:in 'require'
from /home/nitesh/dradis-git/server/config.ru:3:in 'block in <main>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in 'instance_eval'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in 'initialize'
from /home/nitesh/dradis-git/server/config.ru:in 'new'
from /home/nitesh/dradis-git/server/config.ru:in '<main>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in 'eval'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in 'new_from_string'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.5.2/lib/rack/builder.rb:40:in 'parse_file'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.5.2/lib/rack/server.rb:277:in 'build_app_and_options_from_config'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.5.2/lib/rack/server.rb:199:in 'app'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/commands/server.rb:50:in 'app'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.5.2/lib/rack/server.rb:314:in 'wrapped_app'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.5.2/lib/rack/server.rb:250:in 'start'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/commands/server.rb:69:in 'start'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/commands/commands_tasks.rb:81:in 'block in server'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/commands/commands_tasks.rb:76:in 'tap'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/commands/commands_tasks.rb:76:in 'server'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/commands/commands_tasks.rb:40:in 'run_command!'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-4.1.9/lib/rails/commands.rb:17:in '<top (required)>'
from /home/nitesh/dradis-git/server/bin/rails:8:in 'require'
from /home/nitesh/dradis-git/server/bin/rails:8:in '<top (required)>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in 'load'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in 'call'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.1.3/lib/spring/client/command.rb:7:in 'call'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.1.3/lib/spring/client.rb:26:in 'run'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.1.3/bin/spring:48:in '<top (required)>'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.1.3/lib/spring/binstub.rb:11:in 'load'
from /home/nitesh/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.1.3/lib/spring/binstub.rb:11:in '<top (required)>'
from /home/nitesh/dradis-git/server/bin/spring:16:in 'require'
from /home/nitesh/dradis-git/server/bin/spring:16:in '<top (required)>'
from bin/rails:3:in 'load'
from bin/rails:3:in '<main>'