macOSのパッケージ管理のHomebrewをLinuxに入れる。

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

echo 'eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"' >> ~/.profile
eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"

$ brew install rbenv
$ rbenv --version
rbenv 1.2.0

sudo apt update
sudo apt install build-essential
sudo apt install zlib1g-dev libffi-dev libssl-dev

rbenv install 2.6.1
rbenv install 2.7.1
rbenv install 3.2.3
$ rbenv versions
  2.6.1
  2.7.1
  3.2.3