-bash: yum: command not found (不能使用yum命令,离线安装yum) 查看有无 yum安装包 ,有的话卸载: 查看:rpm -qa |grep yum 卸载:rpm -aq|grep yum|xargs rpm -e --nodeps 步骤如下 第一步: http://mirrors.163.com/centos/6/os/x86_... ...