yum可以安裝軟件,也可以卸載軟件
yum安裝軟件的命令爲:yum install fileName
yum 卸載軟件的命令:
sudo yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-selinux \ docker-engine-selinux \ docker-engine