How to Manually Install a Ruby Gem

Gem is a package manager designed to make it easy to find, download, and install libraries for use by the Ruby programming language. However, situations may arise in which you have possession of the gem file itself and do not wish to download a new gem file from the Internet, and in those situations you will want to manually install the gem.

Instructions

    • 1

      Open a terminal. On Windows, you can do this by clicking "Start," "Run," and typing "cmd" in the dialog. On Mac OS X, you can do this by pressing "Cmd-Space" and typing "Terminal."

    • 2

      Navigate to the directory where the gem file is stored using the "cd" command. For example, if it was just downloaded, it will most likely be in the "Downloads" directory, which you can reach by typing:

      cd Downloads

    • 3

      Type the following command to install the gem:

      gem install --local gemname.gem

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