0.检查是否安装 rpm -qa | grep yum list installed | grep
1.用YUM安装软件包命令:yum install xxxx
2.用YUM删除软件包命令:yum remove xxxx
yum安装默认下载路径配置
默认路径:/var/cache/yum
也可以在 /etc/yum.conf 指定
cachedir=/var/cache/yum #存放目录
keepcache=1 #1为保存 0为不保存
metadata_expire=1800 #过期时间
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