Why can't I install rails with gem install rails -v 4.0.0?

Question

I installed on GNU / Linux:

rvm 1.23.16 (stable) Wayne E. Segin, Michal Papis [https://rvm.io/]
ruby 2.0.0p247 (patch 2013-06-27 41674) [x86_64-darwin12.4.0]

I apparently have all the gems in my system, but when I run the command: gem install rails -v 4.0.0 , it states that one stone is installed. But Rails is not installed yet.

When I use gem install rails -v 4.0.0 or gem install rails --version=4.0 the following happens:

 Parsing documentation for rails-4.0.0 unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/belongs_to.png, skipping unable to convert "\xF4" from ASCII-8BIT to UTF-8 for guides/assets/images/book_icon.gif, skipping unable to convert "\x91" from ASCII-8BIT to UTF-8 for guides/assets/images/bullet.gif, skipping unable to convert "\xF5" from ASCII-8BIT to UTF-8 for guides/assets/images/chapters_icon.gif, skipping unable to convert "\xF5" from ASCII-8BIT to UTF-8 for guides/assets/images/check_bullet.gif, skipping unable to convert "\xF4" from ASCII-8BIT to UTF-8 for guides/assets/images/credits_pic_blank.gif, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/csrf.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/edge_badge.png, skipping unable to convert "\x9E" from ASCII-8BIT to UTF-8 for guides/assets/images/favicon.ico, skipping unable to convert "\x80" from ASCII-8BIT to UTF-8 for guides/assets/images/feature_tile.gif, skipping unable to convert "\x80" from ASCII-8BIT to UTF-8 for guides/assets/images/footer_tile.gif, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/fxn.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/challenge.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/confirm_dialog.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/forbidden_attributes_for_new_post.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/form_with_errors.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/index_action_with_edit_link.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/new_post.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/post_with_comments.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/rails_welcome.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/routing_error_no_controller.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/routing_error_no_route_matches.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/show_action_for_posts.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/template_is_missing_posts_new.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/undefined_method_post_path.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/unknown_action_create_for_posts.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/getting_started/unknown_action_new_for_posts.png, skipping unable to convert "\xF0" from ASCII-8BIT to UTF-8 for guides/assets/images/grey_bullet.gif, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/habtm.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/has_many.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/has_many_through.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/has_one.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/has_one_through.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/header_backdrop.png, skipping unable to convert "\x80" from ASCII-8BIT to UTF-8 for guides/assets/images/header_tile.gif, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/i18n/demo_html_safe.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/i18n/demo_localized_pirate.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/i18n/demo_translated_en.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/i18n/demo_translated_pirate.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/i18n/demo_translation_missing.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/i18n/demo_untranslated.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/1.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/10.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/11.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/12.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/13.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/14.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/15.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/2.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/3.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/4.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/5.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/6.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/7.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/8.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/callouts/9.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/caution.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/example.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/home.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/important.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/next.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/note.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/prev.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/tip.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/up.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/icons/warning.png, skipping unable to convert "\xFF" from ASCII-8BIT to UTF-8 for guides/assets/images/jaimeiniesta.jpg, skipping unable to convert "\xF5" from ASCII-8BIT to UTF-8 for guides/assets/images/nav_arrow.gif, skipping unable to convert "\xFF" from ASCII-8BIT to UTF-8 for guides/assets/images/oscardelben.jpg, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/polymorphic.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/radar.png, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/rails4_features.png, skipping unable to convert "\xFF" from ASCII-8BIT to UTF-8 for guides/assets/images/rails_guides_kindle_cover.jpg, skipping unable to convert "\xEC" from ASCII-8BIT to UTF-8 for guides/assets/images/rails_guides_logo.gif, skipping unable to convert "\x8C" from ASCII-8BIT to UTF-8 for guides/assets/images/rails_logo_remix.gif, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/session_fixation.png, skipping unable to convert "\x80" from ASCII-8BIT to UTF-8 for guides/assets/images/tab_grey.gif, skipping unable to convert "\x80" from ASCII-8BIT to UTF-8 for guides/assets/images/tab_info.gif, skipping unable to convert "\x80" from ASCII-8BIT to UTF-8 for guides/assets/images/tab_note.gif, skipping unable to convert "\x80" from ASCII-8BIT to UTF-8 for guides/assets/images/tab_red.gif, skipping unable to convert "\x80" from ASCII-8BIT to UTF-8 for guides/assets/images/tab_yellow.gif, skipping unable to convert "\x89" from ASCII-8BIT to UTF-8 for guides/assets/images/tab_yellow.png, skipping unable to convert "\xFF" from ASCII-8BIT to UTF-8 for guides/assets/images/vijaydev.jpg, skipping 1 gem installed 

How can I install Rails 4.0.0 using RVM?

Answer 1

These error messages are generated while the Rails documentation is installed on your computer. I found two problems with Rails discussing this: # 9590 and # 11814 .

This is ultimately a problem with rdoc and ruby ​​2.0 , which has been fixed but is not in the released version of rdoc.

There are several ways around this, I list them in the order in which I will probably try them:

• Do not install documentation with gem rails; instead of gem install rails do gem install rails --no-rdoc --no-ri . I almost never used the built-in documentation, so I actually have gem: --no-ri --no-rdoc in my ~/.gemrc , so the documentation is never installed for any gem.

• Set rails without documentation, as in No. 1, but then manually create the documentation using the rdoc and --exclude='.dat' flag, for example rdoc --exclude='.dat' activesupport/lib to create activesupport documents, as recommended in this comment .

• Install rdoc from github to the commit, which is later ceb81dd11 . Using the bundler git or github options in your Gemfile makes this easier, but there must be other reasons why the new version has not yet been released, so there may be errors.

Answer 2

I did this a lot, working with new rail users, and often missed users restart the terminal (or any other shell) after installation. The fact that you saw the gem is established, but could not find it right after it could be a symptom. (know his old message, but try to help ease the pain).

Answer 3

run this command

 $ . ~/.bash_profile 

after installing rvm