安裝mysql2報錯：Failed to build gem native extension. ruby extconf.
解決辦法：sudo apt-get install libmysqld-dev
安裝rmagick報錯：rmagick gem install “Can't find Magick-config”
解決辦法：sudo apt-get install libmagickwand-dev
安裝mysql2報錯：Failed to build gem native extension. ruby extconf.
解決辦法：sudo apt-get install libmysqld-dev
安裝rmagick報錯：rmagick gem install “Can't find Magick-config”
解決辦法：sudo apt-get install libmagickwand-dev
![sudo apt-get update 出錯 Updating from such a repository can‘t be done securely, and is therefore[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)