ruby_howto.md

how to install ruby environment

rbenv

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

rbenv plugins

plugin ruby-build

ruby-build is an rbenv plugin that provides an rbenv install command to compile and install different versions of Ruby on UNIX-like systems.

git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build

plugin rbenv-gem-rehash

Never run rbenv rehash again. This rbenv plugin automatically runs rbenv rehash every time you install or uninstall a gem.

git clone https://github.com/sstephenson/rbenv-gem-rehash.git ~/.rbenv/plugins/rbenv-gem-rehash

build tools

dnf install gcc-c++ openssl-devel readline-devel bzip2 

list available ruby versions

rbenv install -l

install ruby-2.5.1

time rbenv install -v 2.5.1

setup ruby version

rbenv global 2.5.1

check project local ruby version (.ruby-version file)

rbenv local 2.5.1

test

ruby -v