title: How to build task 'gems:install'
body: <p>I am deploying my rails app to a linux server and i have some of the rake tasks missing inlcuding rake gems:install and rake db</p>
  
  <p>I am running rails 2.3.4 from GEM.</p>
  
  <p>Why is this?</p>
  
  <p>How do I fix this?  can I update somehow?</p>
  
  <hr>
  
  <p>they are missing from rake -T list</p>
  
  <pre><code>rake apache2                   # Build Apache 2 module
  rake clean                     # Remove compiled files
  rake clobber                   # Remove all generated files
  rake default                   # Build everything
  rake doc                       # Generate all documentation
  rake doxygen                   # Generate Doxygen C++ API documentation if ...
  rake doxygen:clobber           # Remove generated Doxygen C++ API documenta...
  rake doxygen:force             # Force generation of Doxygen C++ API docume...
  rake fakeroot                  # Create a fakeroot, useful for building nat...
  rake nginx                     # Build Nginx helper server
  rake package                   # Build all the packages
  rake package:clean             # Remove package products
  rake package:debian            # Create a Debian package
  rake package:force             # Force a rebuild of the package files
  rake package:gem               # Build the gem file passenger-2.2.4.gem
  rake rdoc                      # Build the rdoc HTML Files
  rake rdoc:clobber              # Remove rdoc products
  rake rdoc:force                # Force a rebuild of the RDOC files
  rake sloccount                 # Run 'sloccount' to see how much code Passe...
  rake test                      # Run all unit tests and integration tests
  rake test:cxx                  # Run unit tests for the Apache 2 and Nginx ...
  rake test:integration          # Run all integration tests
  rake test:integration:apache2  # Run Apache 2 integration tests
  rake test:integration:nginx    # Run Nginx integration tests
  rake test:oxt                  # Run unit tests for the OXT library
  rake test:rcov                 # Run coverage tests for the Ruby libraries
  rake test:restart              # Run the 'restart' integration test infinit...
  rake test:ruby                 # Run unit tests for the Ruby libraries
  </code></pre>
  
  <p>my rake file contains this:</p>
  
  <pre><code># Add your own tasks in files placed in lib/tasks ending in .rake,
  # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
  
  require(File.join(File.dirname(__FILE__), 'config', 'boot'))
  
  require 'rake'
  require 'rake/testtask'
  require 'rake/rdoctask'
  
  require 'tasks/rails'
  </code></pre>
  
  <p>How do I add the gems and db rake tasks?  and why are they missing?</p>