ruby-on-rails – 运行“rails s”的问题

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我在ubuntu中运行rails的问题.当我键入rails它不启动服务器,而是给我这个消息:
kyala@ubuntu:~/depot$rails s

Usage:
  rails new APP_PATH [options]

Options:

-r,[--ruby=PATH]           # Path to the Ruby binary of your choice
                              # Default: /home/kyala/.rvm/rubies/ruby-1.9.2-p290/bin/ruby

-d,[--database=DATABASE]   # Preconfigure for selected database (options: MysqL/oracle/postgresql/sqlite3/frontbase/ibm_db)enter code here
                              # Default: sqlite3

 -b,[--builder=BUILDER]     # Path to an application builder (can be a filesystem path or URL)

-m,[--template=TEMPLATE]   # Path to an application template (can be a filesystem path or URL)
      [--dev]                 # Setup the application with Gemfile pointing to your Rails 

checkout
      [--edge]                # Setup the application with Gemfile pointing to Rails 

repository

[--skip-gemfile]        # Don't create a Gemfile

 -O,[--skip-active-record]  # Skip Active Record files

 -T,[--skip-test-unit]      # Skip Test::Unit files

 -J,[--skip-prototype]      # Skip Prototype files

 -G,[--skip-git]            # Skip Git ignores and keeps


Runtime options:

-f,[--force]    # Overwrite files that already exist

-p,[--pretend]  # Run but do not make any changes

 -q,[--quiet]    # Supress status output

 -s,[--skip]     # Skip files that already exist


Rails options:

 -v,[--version]  # Show Rails version number and quit

  -h,[--help]     # Show this help message and quit


Description:

  The 'rails new' command creates a new Rails application with a default

 directory structure and configuration at the path you specify.

Example:

  rails new ~/Code/Ruby/weblog


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

See the README in the newly created application to get going.

解决方法

尝试重新生成binstubs:
rm bin/*

rake rails:update:bin

应该做的伎俩

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