I want to know if CocoaPods was installed on my Mac. What should I type in terminal?
To execute a sudo command in Terminal on your Mac, you must be logged with an administrator account that has a password. You can use the sudo command in the Terminal app to execute commands as a different user, such as the root user. After you enter the command, Terminal asks you to enter your password.
To check and know more about sudo , open terminal and type man sudo
Cocopods : CocoaPods is a library dependency management tool for OS X and iOS applications. we need Gems to install cocopods .
RubyGems is a package manager for the Ruby programming language that provides a standard format for distributing Ruby programs and libraries (in a self-contained format called a "gem"), a tool designed to easily manage the installation of gems, and a server for distributing them.
To install cocopods : Open terminal and type sudo gem install cocopods , no need to use any Ruby manager (rvn).
If it needed to update gems then use $ gem update --system.