https://infracollege.vamdemicsystem.black/linux/%E6%A7%8B%E7%AF%89%E7%B7%A8/15-%E3%83%AA%E3%83%9D%E3%82%B8%E3%83%88%E3%83%AA%E3%82%B5%E3%83%BC%E3%83%90yum/