特定バージョンのRuby on Railsをインストールする

バージョンを指定したRailsのインストールは、下記。

gem install rails -v インストールするバージョン

インストールされているRailsのバージョンを表示するコマンドは下記。

rails -v

例: Rails 5.2.2.1をインストールする

zen:~$ gem install rails -v 5.2.2.1
Fetching thread_safe-0.3.6.gem
Fetching tzinfo-1.2.5.gem
Fetching i18n-1.6.0.gem
Fetching activesupport-5.2.2.1.gem
Fetching mini_portile2-2.4.0.gem
Fetching nokogiri-1.10.1.gem
Fetching concurrent-ruby-1.1.5.gem
Fetching rails-dom-testing-2.0.3.gem
Fetching rails-html-sanitizer-1.0.4.gem
Fetching loofah-2.2.3.gem
Fetching builder-3.2.3.gem
Fetching actionview-5.2.2.1.gem
Fetching rack-2.0.6.gem
Fetching crass-1.0.4.gem
Fetching rack-test-1.1.0.gem
Fetching erubi-1.8.0.gem
Fetching actionpack-5.2.2.1.gem
Fetching activemodel-5.2.2.1.gem
Fetching activejob-5.2.2.1.gem
Fetching arel-9.0.0.gem
Fetching activerecord-5.2.2.1.gem
Fetching mini_mime-1.0.1.gem
Fetching mail-2.7.1.gem
Fetching globalid-0.4.2.gem
Fetching nio4r-2.3.1.gem
Fetching actionmailer-5.2.2.1.gem
Fetching websocket-extensions-0.1.3.gem
Fetching websocket-driver-0.7.0.gem
Fetching actioncable-5.2.2.1.gem
Fetching mimemagic-0.3.3.gem
Fetching marcel-0.3.3.gem
Fetching activestorage-5.2.2.1.gem
Fetching thor-0.20.3.gem
Fetching rails-5.2.2.1.gem
Fetching method_source-0.9.2.gem
Fetching sprockets-3.7.2.gem
Fetching sprockets-rails-3.2.1.gem
Fetching railties-5.2.2.1.gem
Successfully installed concurrent-ruby-1.1.5
Successfully installed thread_safe-0.3.6
Successfully installed tzinfo-1.2.5

HEADS UP! i18n 1.1 changed fallbacks to exclude default locale.
But that may break your application.

Please check your Rails app for 'config.i18n.fallbacks = true'.
If you're using I18n (>= 1.1.0) and Rails (< 5.2.2), this should be
'config.i18n.fallbacks = [I18n.default_locale]'.
If not, fallbacks will be broken in your app by I18n 1.1.x.

For more info see:
https://github.com/svenfuchs/i18n/releases/tag/v1.1.0

Successfully installed i18n-1.6.0
Successfully installed activesupport-5.2.2.1
Successfully installed mini_portile2-2.4.0
Building native extensions. This could take a while...
Successfully installed nokogiri-1.10.1
Successfully installed rails-dom-testing-2.0.3
Successfully installed crass-1.0.4
Successfully installed loofah-2.2.3
Successfully installed rails-html-sanitizer-1.0.4
Successfully installed erubi-1.8.0
Successfully installed builder-3.2.3
Successfully installed actionview-5.2.2.1
Successfully installed rack-2.0.6
Successfully installed rack-test-1.1.0
Successfully installed actionpack-5.2.2.1
Successfully installed activemodel-5.2.2.1
Successfully installed arel-9.0.0
Successfully installed activerecord-5.2.2.1
Successfully installed mini_mime-1.0.1
Successfully installed mail-2.7.1
Successfully installed globalid-0.4.2
Successfully installed activejob-5.2.2.1
Successfully installed actionmailer-5.2.2.1
Building native extensions. This could take a while...
Successfully installed nio4r-2.3.1
Successfully installed websocket-extensions-0.1.3
Building native extensions. This could take a while...
Successfully installed websocket-driver-0.7.0
Successfully installed actioncable-5.2.2.1
Successfully installed mimemagic-0.3.3
Successfully installed marcel-0.3.3
Successfully installed activestorage-5.2.2.1
Successfully installed method_source-0.9.2
Successfully installed thor-0.20.3
Successfully installed railties-5.2.2.1
Successfully installed sprockets-3.7.2
Successfully installed sprockets-rails-3.2.1
Successfully installed rails-5.2.2.1
Parsing documentation for concurrent-ruby-1.1.5
Installing ri documentation for concurrent-ruby-1.1.5
Parsing documentation for thread_safe-0.3.6
Installing ri documentation for thread_safe-0.3.6
Parsing documentation for tzinfo-1.2.5
Installing ri documentation for tzinfo-1.2.5
Parsing documentation for i18n-1.6.0
Installing ri documentation for i18n-1.6.0
Parsing documentation for activesupport-5.2.2.1
Installing ri documentation for activesupport-5.2.2.1
Parsing documentation for mini_portile2-2.4.0
Installing ri documentation for mini_portile2-2.4.0
Parsing documentation for nokogiri-1.10.1
Installing ri documentation for nokogiri-1.10.1
Parsing documentation for rails-dom-testing-2.0.3
Installing ri documentation for rails-dom-testing-2.0.3
Parsing documentation for crass-1.0.4
Installing ri documentation for crass-1.0.4
Parsing documentation for loofah-2.2.3
Installing ri documentation for loofah-2.2.3
Parsing documentation for rails-html-sanitizer-1.0.4
Installing ri documentation for rails-html-sanitizer-1.0.4
Parsing documentation for erubi-1.8.0
Installing ri documentation for erubi-1.8.0
Parsing documentation for builder-3.2.3
Installing ri documentation for builder-3.2.3
Parsing documentation for actionview-5.2.2.1
Installing ri documentation for actionview-5.2.2.1
Parsing documentation for rack-2.0.6
Installing ri documentation for rack-2.0.6
Parsing documentation for rack-test-1.1.0
Installing ri documentation for rack-test-1.1.0
Parsing documentation for actionpack-5.2.2.1
Installing ri documentation for actionpack-5.2.2.1
Parsing documentation for activemodel-5.2.2.1
Installing ri documentation for activemodel-5.2.2.1
Parsing documentation for arel-9.0.0
Installing ri documentation for arel-9.0.0
Parsing documentation for activerecord-5.2.2.1
Installing ri documentation for activerecord-5.2.2.1
Parsing documentation for mini_mime-1.0.1
Installing ri documentation for mini_mime-1.0.1
Parsing documentation for mail-2.7.1
Installing ri documentation for mail-2.7.1
Parsing documentation for globalid-0.4.2
Installing ri documentation for globalid-0.4.2
Parsing documentation for activejob-5.2.2.1
Installing ri documentation for activejob-5.2.2.1
Parsing documentation for actionmailer-5.2.2.1
Installing ri documentation for actionmailer-5.2.2.1
Parsing documentation for nio4r-2.3.1
Installing ri documentation for nio4r-2.3.1
Parsing documentation for websocket-extensions-0.1.3
Installing ri documentation for websocket-extensions-0.1.3
Parsing documentation for websocket-driver-0.7.0
Installing ri documentation for websocket-driver-0.7.0
Parsing documentation for actioncable-5.2.2.1
Installing ri documentation for actioncable-5.2.2.1
Parsing documentation for mimemagic-0.3.3
Installing ri documentation for mimemagic-0.3.3
Parsing documentation for marcel-0.3.3
Installing ri documentation for marcel-0.3.3
Parsing documentation for activestorage-5.2.2.1
Installing ri documentation for activestorage-5.2.2.1
Parsing documentation for method_source-0.9.2
Installing ri documentation for method_source-0.9.2
Parsing documentation for thor-0.20.3
Installing ri documentation for thor-0.20.3
Parsing documentation for railties-5.2.2.1
Installing ri documentation for railties-5.2.2.1
Parsing documentation for sprockets-3.7.2
Installing ri documentation for sprockets-3.7.2
Parsing documentation for sprockets-rails-3.2.1
Installing ri documentation for sprockets-rails-3.2.1
Parsing documentation for rails-5.2.2.1
Installing ri documentation for rails-5.2.2.1
Done installing documentation for concurrent-ruby, thread_safe, tzinfo, i18n, activesupport, mini_portile2, nokogiri, rails-dom-testing, crass, loofah, rails-html-sanitizer, erubi, builder, actionview, rack, rack-test, actionpack, activemodel, arel, activerecord, mini_mime, mail, globalid, activejob, actionmailer, nio4r, websocket-extensions, websocket-driver, actioncable, mimemagic, marcel, activestorage, method_source, thor, railties, sprockets, sprockets-rails, rails after 40 seconds
38 gems installed
zen:~$
zen:~$ rails -v
Rails 5.2.2.1
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