Installation guide for several ruby gems

typhoeus
In order to install the typhoeus gem, you need to have the curl library installed. You can do this by:

sudo apt-get install libcurl4-openssl-dev

linecache19
linecache19 requires vm_core.h which needs to be included when installing ruby-debug19

sudo gem install ruby-debug19 -- --with-ruby-include=/src_file_paht_with_vm_core.h

Installing rubygems

Installing rubygems on Ubuntu 11.04 takes several steps:

$ sudo apt-get install rubygems rubygems-update
$ gem env | grep EXECUTABLE
// cd to the executable directory
$ update_rubygems 
// now rubygems will be installed in the correct directory.

Libraries needed for RoR development

For a RoR project that has a Gemfile, you can install all the required gems using the bundle command. You need to install bundler first. You may also install some other apps/libraries by using the following commands:

sudo apt-get install build-essential ruby1.8-dev
sudo apt-get install mysql-server mysql-client libmysqlclient-dev
sudo apt-get install sqlite3 libsqlite3-dev
sudo gem update --system 
sudo gem install bundler