RVM https://rvm.io/RVM is a command-line tool which allows you to easilyinstall, manage, and work with multiple ruby environmentsfrom interpreters to sets of gems.
UbuntuUbuntu is a computer operating system based on the Debian Linuxdistribution and distributed as free and open source software, using its owndesktop environment. It is named after the Southern African philosophy ofubuntu.Ubuntu is designed primarily for use on personal computers, althougha server edition also exists.
ThinThin is a Ruby web server that glues together 3 of the best Ruby libraries inweb history:Mongrel parser, Event Machine, Rack.Which makes it, with all humility, the most secure, stable, fast and extensibleRuby web server bundled in an easy to use gem for your own pleasure.
CapistranoCapistrano is a developer tool for deploying webapplications. It is typically installed on a workstation, andused to deploy code from your source code management(SCM) to one, or more servers.
ForemanForeman is a manager for Procfile-based applications. Itsaim is to abstract away the details of the Procfile format,and allow you to either run your application directly orexport it to some other process management format.
UpstartUpstart is an event-based replacement for the /sbin/initdaemon which handles starting of tasks and servicesduring boot, stopping them during shutdown andsupervising them while the system is running.