How to install RubyGems on Linux (Ubuntu & Other)

RubyGems is a package management application for Ruby that is used to quickly and easily distribute Ruby/Rails applications and libraries. If you are planning on doing any development in Ruby, this is a must have. RubyGems is for Ruby as apt-get and yum are to Linux operating systems. This article will show you various ways to install it depending on what Linux distribution you are using.

Installing RubyGems Using apt-get on Ubuntu

sudo apt-get install rubygems

Installing RubyGems Using yum

sudo yum install rubygems

Manual Installation Method

tar xvf rubygems-1.5.0.tgz
cd rubygems-1.5.0
sudo ruby setup.rb

That’s all there is to it! You can begin install gems by using the gem install command

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11 thoughts on “How to install RubyGems on Linux (Ubuntu & Other)”

  1. I tried the yum on RHEL6 no go
    I tried the manual installation and I get
    rubygems-2.0.3]# ruby setup.rb
    RubyGems 2.0.3 installed
    ERROR: While executing gem … (Gem::DocumentError)
    RDoc is not installed: no such file to load — rdoc/rdoc
    rubygems-2.0.3]# ls

  2. RubyGems 2.5.1 installed
    ERROR: While executing gem … (NameError)
    uninitialized constant Gem::SourceIndex
    Did you mean? Gem::Source

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