I get this error when running my ruby server:
$ rails run
rails aborted!
Don't know how to build task 'run' (see --tasks)
/home/daniel/.rvm/gems/ruby-2.3.0/gems/railties-
5.0.6/lib/rails/commands/rake_proxy.rb:14:in 'block in run_rake_task'
/home/daniel/.rvm/gems/ruby-2.3.0/gems/railties-
5.0.6/lib/rails/commands/rake_proxy.rb:11:in 'run_rake_task'
/home/daniel/.rvm/gems/ruby-2.3.0/gems/railties-
5.0.6/lib/rails/commands/commands_tasks.rb:51:in 'run_command!'
/home/daniel/.rvm/gems/ruby-2.3.0/gems/railties-
5.0.6/lib/rails/commands.rb:18:in '<top (required)>'
/home/daniel/Documentos/RedRuby/backend-2016/bin/rails:9:in 'require'
/home/daniel/Documentos/RedRuby/backend-2016/bin/rails:9:in '<top
(required)>'
/home/daniel/.rvm/gems/ruby-2.3.0/gems/spring-
2.0.2/lib/spring/client/rails.rb:28:in 'load'
/home/daniel/.rvm/gems/ruby-2.3.0/gems/spring-
2.0.2/lib/spring/client/rails.rb:28:in 'call'
/home/daniel/.rvm/gems/ruby-2.3.0/gems/spring-
2.0.2/lib/spring/client/command.rb:7:in 'call'
/home/daniel/.rvm/gems/ruby-2.3.0/gems/spring-
2.0.2/lib/spring/client.rb:30:in 'run'
/home/daniel/.rvm/gems/ruby-2.3.0/gems/spring-2.0.2/bin/spring:49:in '
<top (required)>'
/home/daniel/.rvm/gems/ruby-2.3.0/gems/spring-
2.0.2/lib/spring/binstub.rb:31:in 'load'
/home/daniel/.rvm/gems/ruby-2.3.0/gems/spring-
2.0.2/lib/spring/binstub.rb:31:in '<top (required)>'
/home/daniel/Documentos/RedRuby/backend-2016/bin/spring:13:in '
require'
/home/daniel/Documentos/RedRuby/backend-2016/bin/spring:13:in '<top
(required)>'
bin/rails:3:in 'load'
bin/rails:3:in '<main>'
(See full trace by running task with --trace)
my version of ruby is 2.3.0 and of rails I had it in 5.0.0.beta2 but it was changed, at the time of bundle update, to the version 5.0.6
summarizing, how my server could run since it does not let me