Ubuntu で OS のシステム更新を行うときは, 端末で,次のコマンドを実行する.
Ubuntu のインストールは別ページ »で説明
sudo apt -y update sudo apt -yV upgrade sudo /sbin/shutdown -r now
apt -yV install ruby ruby-dev
gem update --system gem install rails --include-dependencies gem install facets --include-dependencies gem install rmagick --include-dependencies gem install mysql --include-dependencies gem install sqlite3-ruby --include-dependencies gem install wirble --include-dependencies gem install rmagick --include-dependencies gem install gruff --include-dependencies