安裝Ruby

使用rbenv https://github.com/rbenv/rbenv

建議安裝rbenv
因為參考Jekyll官網的安裝方法會出現許多問題
ERROR: Error installing jekyll:
ERROR: Failed to build gem native extension.

或 ERROR: While executing gem … (Gem::CommandLineError)
Unknown command jekyll
或
ERROR: While executing gem … (Gem::FilePermissionError)
You don’t have write permissions for the /Library/Ruby/Gems/2.6.0 directory.
參考以下文章
https://www.rubyonmac.dev/error-installing-jekyll-failed-to-build-gem-native-extension

安裝方法，參考
https://github.com/rbenv/rbenv

輸入

brew install rbenv ruby-build

sudo apt install rbenv

rbenv init

選擇要安裝的版本

rbenv install -l

安裝3.2.2

rbenv install 3.2.2

rbenv global 3.2.2  
rbenv local 3.2.2   

gem install bundler

gem env home

echo ‘eval “$(rbenv init -)”’ » ~/.zshrc source ~/.zshrc 這一步最重要官網沒提到

參考如何更改舊ruby路徑