docker 安装错误Transaction Check Error 安装docker提示:Transaction Check Error: file /usr/bin/docker from install of docker-io-1.7.1-2.el6.x86_64 conflicts with file from package docker-1.5-5.el6.x86_64 解答:这个是因为先装了docker,再装docker-io后的结果,解决方法是yum remove docker后再yum install docker-io即可。