下载阿里源与初始化安装包

 cd /etc/yum.repos.d/ &&  rm  -rf ./* &&  wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo && wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
 yum install gcc gcc-c++ unzip lsof  sysstat iotop autoconf make  libtool expat-devel libxml2-devel  bash-completion telnet tree lrzsz wget net-tools vim* -y

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