Ubuntu Railsのコントローラー生成時のエラーについて

Ubuntuにてrailsのコントローラーを生成することができません。

入力コマンド

rails g controller コントローラー名　アクション名

エラーは次の通りです。

/home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/app_loader.rb:40: warning: Insecure world writable dir /home//.rbenv/versions in PATH, mode 040777
/home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/application/configuration.rb:133:in `read': Cannot load `Rails.application.database_configuration`:
Permission denied @ rb_sysopen - /home////config/database.yml (Errno::EACCES)
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/application/configuration.rb:133:in `read'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/railties-5.1.7/lib/rails/application/configuration.rb:133:in `database_configuration'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activerecord-5.1.7/lib/active_record/railtie.rb:121:in `block (2 levels) in <class:Railtie>'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/lazy_load_hooks.rb:69:in `instance_eval'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/lazy_load_hooks.rb:69:in `block in execute_hook'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/lazy_load_hooks.rb:60:in `with_execution_control'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/lazy_load_hooks.rb:65:in `execute_hook'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/lazy_load_hooks.rb:50:in `block in run_load_hooks'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/lazy_load_hooks.rb:49:in `each'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/lazy_load_hooks.rb:49:in `run_load_hooks'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activerecord-5.1.7/lib/active_record/base.rb:326:in `<module:ActiveRecord>'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activerecord-5.1.7/lib/active_record/base.rb:25:in `<top (required)>'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/dependencies.rb:292:in `require'
@DESKTOP:~//$       from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/dependencies.rb:292:in `block in require'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/dependencies.rb:258:in `load_dependency'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activesupport-5.1.7/lib/active_support/dependencies.rb:292:in `require'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/application.rb:370:in `active_record_configured?'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/application.rb:287:in `disconnect_database'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/application.rb:111:in `preload'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/application.rb:157:in `serve'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/application.rb:145:in `block in run'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/application.rb:139:in `loop'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/application.rb:139:in `run'
        from /home//.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/spring-2.1.0/lib/spring/application/boot.rb:19:in `<top (required)>'
        from /home//.rbenv/versions/2.5.1/lib/ruby/site_ruby/2.5.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from /home//.rbenv/versions/2.5.1/lib/ruby/site_ruby/2.5.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from -e:1:in `<main>

よろしくお願いします。