1. Check the content of the id_rsa.pub file in your system, that should match with the ssh keys in your github account. Copy the content of the  id_rsa.pub file and paste it your github account settings page. https://github.com/account/ssh
2. If still not working, check whether the port 22 is opened/blocked from your system, as that was the issue in my case, it was blocked.
3. Check status of port in Windows
4. Open the port 22, if its blocked.  Use the command : netsh firewall add portopening TCP 22 SSH enable subnet. Refer here for details about configuring Windows firewall.
5. If still not working,  generate new ssh keys.
6. Try cloning from git, it should work :)

1. Fatal error, port 22 can't connect to the mentioned url: The error is caused as port 22 of your machine is blocked. You maybe behind a firewall or using a secure connection (like vpn) to connect to the network. Please disconnect vpn to connect to heroku or check your firewall settings and even if that doesn't work ask the infrastructure team to unblock the port 22. This may appear while pushing your changes to github repository too.
2. permission-denied-publickey-when-deploying-heroku-code-fatal-the-remote-end:  I found the solution from stack overflow. It is not able to find the keys in heroku, try uploading those to the Heroku site using the following command from the application directory from the command prompt. heroku keys:add ~/.ssh/id_rsa.pub 
3. Assets are not precompiled : Either you can refer to the Heroku site  or execute the steps in sequence.
   (i) Add a production block in the database.yml
   (ii) precompile the assets in your local with the following command RAILS_ENV = production rake assets:precompile
   (iii) git add public/assets
   (iv) git commit -m " pre complied assets"
   (v) git push heroku master
4. [remote rejected] master -> master (pre-receive hook declined) error:  This usually occurs after you  have added a new gem and trying to push the Gemfile without the Gemfile.lock being updated. The best way is to remove the Gemfile.lock,
   (i) rm rf Gemfile.lock from the app dir
   (ii) bundle install (this will create a new gemfile.lock)
   (iii) git add . (iv) git commit -m "bundle" (v) git push heroku master
   Refer to this stack overflow issue for details. 
5. Unable to install pg(posgre) gem in ubuntu:  To install pg gem in ubuntu, apart from adding the gem in the bundler you need to first install the package for installation of the native extensions and the dependencies for the pg gem.
   (i) From the root directory in ubuntu, install the package with this command
   $ sudo apt-get install libpq-dev
   (ii) Add the pg  gem in your Gemfile.
   (iii) bundle
   (iv) git add .
   (v) git commit -m "added pg gem for heroku deployment"
   (vi) git push heroku master

6. Sprockets::Helpers::RailsHelper::AssetPaths::AssetNotPrecompiledError: To precompile assets and make them working in production(heroku url), add the assets to precompiled as string in production.rb file.
   (i) config.asset.precompile = %w(styles.css example.js)
   (ii) config.asset.precompile = true

   
   

• Devkit 
• changing the Rubygems version
• using ruby 1.8.7 and ruby 1.9.2 both, using pik

1. cd vendor/gems/factory_girl_rails-1.0.1
2. gem specification factory_girl_rails > .specification [Don't specify the gem version while generating the specification file].
3. Or if you have to mention the version use the syntax below

1. wired connection error, unable to connect to INTERNET from the Virtual Machine. Mainly this is caused not only due to your internet connection/ speed but by a corrupted Virtual machine. refer here for detail.
2. ERROR: Error running '/usr/bin/make install', please read /usr/share/ruby-rvm/log/zlib/make.install.log. This is mainly caused as you are not executing the commands from the administrator mode. In order to do that, instead of doing $ rvm pkg install zlib do $sudo rvm package install zlib.
3. Nokogiri / ruby gems with native C extension failure. Refer nokogiri site for details or follow the below commands for Ubuntu.
   Ubuntu doesn’t come with the Ruby development packages that are required for building gems with C extensions.Following are the commands for that.

4. # ruby developer packages
   sudo apt-get install ruby1.8-dev ruby1.8 ri1.8 rdoc1.8 irb1.8
   sudo apt-get install libreadline-ruby1.8 libruby1.8 libopenssl-ruby
   
   # nokogiri requirements
   sudo apt-get install libxslt-dev libxml2-dev
   sudo gem install nokogiri

5. Invalid gemspec:: invalid date format in specification: error. For any of kind of such error you need to manually edit all the gemspec files which have this error. Look here for details. Otherwise simple change the date format to this s.date = %q{2011-08-31} . For changing the file you may need the root permission, i.e $ sudo vi /path/filename.gemspec will open the file in read-write mode.
6. Mysql: sudo apt-get install mysql-server mysql-client

   sudo apt-get install libmysql-ruby libmysqlclient-dev
   sudo gem install mysql

7. How to add mysql database related stuff : [[ -s "/usr/share/ruby-rvm/scripts/rvm" ]] && source "/usr/share/ruby-rvm/scripts/rvm"
Remember to add the above lines in the .bashrc file. You can get the file from the root dir (in the terminal type cd..to go to your root dir), just type sudo vi ~/.bashrc [for editing the file as a root user]
8. How can I share folders/files in VMware: It is as simple as the screenshots below. But remember to have the VMware tools installed, which comes as default in the latest version though :)

Installing rbx-require-relative (0.0.5) Unfortunately, a fatal error has occurred.
Please report this error to the Bundler issue tracker at https://github.com/carlhuda/
bundler/issues so that we can fix it. Thanks!/Users/sjain/.rvm/rubies/ruby-1.9.2-p290/
lib/ruby/site_ruby/1.9.1/rubygems/ installer.rb:364:in `ensure_required_ruby_version_met':
rbx-require-relative requires Ruby version ~> 1.8.7. (Gem::InstallError)

  gem 'ruby-debug'

  gem 'ruby-debug19'

1. gem install haml
2. or in bundler, add gem 'haml'
3. make a file inside the view/ directory with extension as .haml.html

• - has to be added for ruby code which has not to be evaluated <% %>, like for, if, else
• = for ruby code which has to be evaluated, similar to <%= %>
• % for html tags, like th, td, h1 etc.
• no tags are required in haml

1. Download git on windows from http://code.google.com/p/msysgit/downloads/
2. Use git

• Ssh-keygen –t rsa –C hello@gmail.com
• git config --global user.email  hello@gmail.com
• git config --global user.name “Hi Hello“
• git config --global github.user hi-hello 
• git config --global github.token 0987654321yourf0123456789