title: Gemfile.lock write error, permissions?
body: <p>I created a Rails model "model" a while ago and now I'm trying to run the server.  After a <code>bundle install</code> I get: </p>
  
  <blockquote>
    <p>There was an error while trying to write to Gemfile.lock. It is likely that  you need to allow write permissions for the file at path: <code>/home/thiago/model/Gemfile.lock</code></p>
  </blockquote>
  
  <p>Tried <code>rails s</code> to see what happens and:</p>
  
  <pre>
  /home/thiago/.rvm/gems/ruby-1.9.3-p429/gems/bundler-1.3.5/lib/bundler/definition.rb:235:in `rescue in lock': There was an error while trying to write to Gemfile.lock. It is likely that  (Bundler::InstallError)
  you need to allow write permissions for the file at path: 
  /home/thiago/model/Gemfile.lock
    from /home/thiago/.rvm/gems/ruby-1.9.3-p429/gems/bundler-1.3.5/lib/bundler/definition.rb:220:in `lock'
    from /home/thiago/.rvm/gems/ruby-1.9.3-p429/gems/bundler-1.3.5/lib/bundler/environment.rb:34:in `lock'
    from /home/thiago/.rvm/gems/ruby-1.9.3-p429/gems/bundler-1.3.5/lib/bundler/runtime.rb:43:in `setup'
    from /home/thiago/.rvm/gems/ruby-1.9.3-p429/gems/bundler-1.3.5/lib/bundler.rb:120:in `setup'
    from /home/thiago/.rvm/gems/ruby-1.9.3-p429@global/gems/rubygems-bundler-1.1.1/lib/rubygems-bundler/noexec.rb:79:in `setup'
    from /home/thiago/.rvm/gems/ruby-1.9.3-p429@global/gems/rubygems-bundler-1.1.1/lib/rubygems-bundler/noexec.rb:91:in `'
    from /home/thiago/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:110:in `require'
    from /home/thiago/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:110:in `rescue in require'
    from /home/thiago/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:35:in `require'
    from /home/thiago/.rvm/gems/ruby-1.9.3-p429/bin/ruby_noexec_wrapper:9:in `'
  </pre>
  
  <p>Can I set the permissions for the Gemfile.lock so I can bundle and run server?</p>
  
  <pre>
  $ ls -a -l
  total 80
  drwxr-xr-x. 13 root   root   4096 May 19 14:08 .
  drwx------. 41 thiago thiago 4096 Jul  7 23:51 ..
  drwxr-xr-x.  8 root   root   4096 May 19 14:08 app
  drwxr-xr-x.  5 root   root   4096 May 19 14:08 config
  -rw-r--r--.  1 root   root    155 May 19 14:08 config.ru
  drwxr-xr-x.  2 root   root   4096 May 19 14:08 db
  drwxr-xr-x.  2 root   root   4096 May 19 14:08 doc
  -rw-r--r--.  1 root   root    765 May 19 14:08 Gemfile
  -rw-r--r--.  1 root   root    430 May 19 14:08 .gitignore
  drwxr-xr-x.  4 root   root   4096 May 19 14:08 lib
  drwxr-xr-x.  2 root   root   4096 May 19 14:08 log
  drwxr-xr-x.  2 root   root   4096 May 19 14:08 public
  -rw-r--r--.  1 root   root    270 May 19 14:08 Rakefile
  -rw-r--r--.  1 root   root   9208 May 19 14:08 README.rdoc
  drwxr-xr-x.  2 root   root   4096 May 19 14:08 script
  drwxr-xr-x.  7 root   root   4096 May 19 14:08 test
  drwxr-xr-x.  3 root   root   4096 May 19 14:08 tmp
  drwxr-xr-x.  4 root   root   4096 May 19 14:08 vendor
  </pre>
  
  <p>Model files created incorrectly?</p>