How to find out your current Rails LTS version

Rails 3.2 LTS, 4.2 LTS, 5.2 LTS

Run the following command:

bundle show rails

This will display the path of the installed rails gem. The path will contain the version number, e.g. 3.2.22.8 below:

/home/alice/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rails-3.2.22.8
                                                                 ^^^^^^^^

Rails LTS 2.3

Installation with bundler

As a customer of a paid plan who has installed Rails LTS with Bundler, run the following:

bundle show rails

This will display the path of the installed rails gem. The path will contain the version number, e.g. 2.3.18.18 below:

/home/alice/.rbenv/versions/1.8.7-p375/lib/ruby/gems/1.8/gems/rails-2.3.18.19
                                                              ^^^^^^^^^^^^^^^

Installation without bundler

As a customer of a paid plan who has installed Rails LTS without Bundler, run the following:

gem list | grep rails

Community edition

As a subscriber to the free Community edition, run the following:

# on 2.3
$ script/runner 'puts RailsLts::VERSION.to_s' # say "script/runner -e production ..." on production

# on 3.2
$ rails runner 'puts RailsLts::VERSION.to_s' #say "script/runner -e production ..." on production

That command will not work on older versions since RailsLts::VERSION did not exist back then. You will encounter an error like this:

.../gems/railslts-bcf87a3aad2b/activesupport/lib/active_support/dependencies.rb:469:in `load_missing_constant': uninitialized constant RailsLts (NameError)

In such cases you can be confident that you are not on the most recent version and should update to the latest release now.