2.准备ISO镜像文件
3.从ISO文件启动虚拟机
4.配置YUM源：
（Debian的话，不要配置apt源,这里我用的是redhat,所以要配置yum源）
cd /etc/yum.repos.d
vim rhel-source.repo
[base] name=CentOS-$releasever - Base baseurl=http://mirrors.163.com/centos/6.5/os/$basearch/ gpgcheck=1 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6 #released updates [updates] name=CentOS-$releasever - Updates baseurl=http://mirrors.163.com/centos/6.5/updates/$basearch gpgcheck=1 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6 [extras] name=CentOS-$releasever - Extras baseurl=http://mirrors.163.com/centos/6.5/extras/$basearch gpgcheck=1 gpgkey=http://mirrors.163.com/centos/RPM-GPG-CentOS-6 [centosplus] name=CentOS-$Releasever - Plus baseurl=http://mirrors.163.com/centos/6.5/centosplus/$basearch gpgcheck=1 enabled=0
然后在执行yum update更新源，之后就可以安装需要的包了。