Ruby on Railsのインストール方法について

Question

Ruby on Railsのインストールをしているのですが、上手くいきません。
下記はcmdで表示されている内容となります。
勉強不足で申し訳ございませんが、どなたかご回答をお願いいたします。
OS:windows

ruby 2.6.5p114 (2019-10-01 revision 67812) [x64-mingw32]

C:\Users\liver>rails s -b 0.0.0.0
Usage:
rails new APP_PATH [options]

Options:
[--skip-namespace], [--no-skip-namespace] # Skip namespace (affects only isolated applications)
-r, [--ruby=PATH] # Path to the Ruby binary of your choice
# Default: C:/Ruby26-x64/bin/ruby.exe
-m, [--template=TEMPLATE] # Path to some application template (can be a filesystem path or URL)
-d, [--database=DATABASE] # Preconfigure for selected database (options: mysql/postgresql/sqlite3/oracle/frontbase/ibm_db/sqlserver/jdbcmysql/jdbcsqlite3/jdbcpostgresql/jdbc)
# Default: sqlite3
[--skip-gemfile], [--no-skip-gemfile] # Don't create a Gemfile
-G, [--skip-git], [--no-skip-git] # Skip .gitignore file
[--skip-keeps], [--no-skip-keeps] # Skip source control .keep files
-M, [--skip-action-mailer], [--no-skip-action-mailer] # Skip Action Mailer files
[--skip-action-mailbox], [--no-skip-action-mailbox] # Skip Action Mailbox gem
[--skip-action-text], [--no-skip-action-text] # Skip Action Text gem
-O, [--skip-active-record], [--no-skip-active-record] # Skip Active Record files
[--skip-active-storage], [--no-skip-active-storage] # Skip Active Storage files
-P, [--skip-puma], [--no-skip-puma] # Skip Puma related files
-C, [--skip-action-cable], [--no-skip-action-cable] # Skip Action Cable files
-S, [--skip-sprockets], [--no-skip-sprockets] # Skip Sprockets files
[--skip-spring], [--no-skip-spring] # Don't install Spring application preloader
[--skip-listen], [--no-skip-listen] # Don't generate configuration that depends on the listen gem
-J, [--skip-javascript], [--no-skip-javascript] # Skip JavaScript files
[--skip-turbolinks], [--no-skip-turbolinks] # Skip turbolinks gem
-T, [--skip-test], [--no-skip-test] # Skip test files
[--skip-system-test], [--no-skip-system-test] # Skip system test files
[--skip-bootsnap], [--no-skip-bootsnap] # Skip bootsnap gem
[--dev], [--no-dev] # Setup the application with Gemfile pointing to your Rails checkout
[--edge], [--no-edge] # Setup the application with Gemfile pointing to Rails repository
[--rc=RC] # Path to file containing extra configuration options for rails command
[--no-rc], [--no-no-rc] # Skip loading of extra configuration options from .railsrc file
[--api], [--no-api] # Preconfigure smaller stack for API only apps
-B, [--skip-bundle], [--no-skip-bundle] # Don't run bundle install
--webpacker, [--webpack=WEBPACK] # Preconfigure Webpack with a particular framework (options: react, vue, angular, elm, stimulus)
[--skip-webpack-install], [--no-skip-webpack-install] # Don't run Webpack install

Runtime options:
-f, [--force] # Overwrite files that already exist
-p, [--pretend], [--no-pretend] # Run but do not make any changes
-q, [--quiet], [--no-quiet] # Suppress status output
-s, [--skip], [--no-skip] # Skip files that already exist

Rails options:
-h, [--help], [--no-help] # Show this help message and quit
-v, [--version], [--no-version] # Show Rails version number and quit

Description:
The 'rails new' command creates a new Rails application with a default
directory structure and configuration at the path you specify.

You can specify extra command-line arguments to be used every time
'rails new' runs in the .railsrc configuration file in your home directory.

Note that the arguments specified in the .railsrc file don't affect the
defaults values shown above in this help message.

Example:
rails new ~/Code/Ruby/weblog

This generates a skeletal Rails installation in ~/Code/Ruby/weblog.

Answer 1

こんにちは、reds1113さん

質問拝見しました。

コマンドの内容を見ると、Ruby、Railsともに、上手くインストールされるようです。
実行したコマンドの rails s -b 0.0.0.0 は、Railsのローカルサーバを起動するコマンドで、拝見したメッセージがでているので、現状は

• Railsのプロジェクトが作成されていない
• 作ったRailsのプロジェクトディレクトリに移動していない

のどちらかの状況だと思われます。

• もしRailsプロジェクトを作成していないようであれば、rails new your_app のようにプロジェクトを作成し、rails s -b 0.0.0.0 を実行します。
• Railsの新たなプロジェクトをもしすでに作っているようであれば、そのディレクトリに移動し、rails s -b 0.0.0.0 を実行します。

以上、参考になれば、幸いです。