What to do if you can't use the rails command

After upgrading the version of ruby, when I tried rails s, I couldn't use the command.

$ rails --version rbenv: rails: command not found The `rails' command exists in these Ruby versions: 2.6.5

Conclusion Let's install gem'rails'

1.gem update --system 2.gem install bundler 3.gem install rails

Type rails -v in your terminal and you should see Rails 5.2.3.

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