Installing a Newer Version of Ruby on CentOS 7

The default Ruby version installed via yum install ruby on CentOS 7 is 2.0.

To install the latest version of Ruby on CentOS 7, you can follow these steps:

Update the system: sudo yum update
Install necessary dependencies: sudo yum install -y curl git-core gcc-c++ patch readline readline-devel zlib zlib-devel libyaml-devel libffi-devel openssl-devel make bzip2 autoconf automake libtool bison

Install rbenv (for Ruby version management):

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git clone https://github.com/rbenv/rbenv.git ~/.rbenv 
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc 
echo 'eval "$(rbenv init -)"' >> ~/.bashrc 
source ~/.bashrc

Install the ruby-build plugin (for installing different Ruby versions):

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git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build 
echo 'export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bashrc 
source ~/.bashrc

Install OpenSSL: sudo yum install -y openssl-devel

Install the latest version of Ruby:

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rbenv install --list # List available Ruby versions 
rbenv install <version> # Install a specific Ruby version, e.g., rbenv install 3.0.2

Set the global default Ruby version: rbenv global <version> # Set global default Ruby version, e.g., rbenv global 3.0.2

Verify the installation:

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ruby --version # Check Ruby version 
gem --version # Check gem (Ruby package manager) version

You have now successfully installed the latest version of Ruby. Please install the desired Ruby version based on your needs and set it as the default version.