error installing rails ubuntu 12.10 [duplicate]

error installing rails ubuntu 12.10 [duplicate]

References

Reference NO 1

http://stackoverflow.com/questions/13652788/ruby-on-rails-installing-json-ubuntu-error

Reference NO 2

http://stackoverflow.com/questions/14969715/rails-installing-on-ubuntu-cannot-load-mkmf

Reference NO 3

http://excid3.com/blog/setting-up-rails-on-ubuntu-12-10-quantal-quetzal-with-ruby-node-js-nginx-passenger-and-mysql-or-postgres/

Reference NO 4

http://architects.dzone.com/articles/installing-rails-ubuntu-1210

Reference NO 5

http://askubuntu.com/questions/tagged/ruby?sort=active

Reference NO 6

https://gist.github.com/abitdodgy/5600034

Reference NO 7

https://www.digitalocean.com/community/articles/how-to-install-the-latest-version-of-nginx-on-ubuntu-12-10

Reference NO 8

#EANF#