安装依赖包

为了确保Greenplum在操作系统上的正常运行，需要安装一些必要的依赖包。

1. 安装依赖包。

   1	yum -y install curl-devel bzip2-devel python2-devel openssl-devel readline-devel perl-ExtUtils-Embed libxml2-devel openldap-devel pam pam-devel perl-devel apr-devel libevent-devel libyaml libyaml-devel libedit-devel libffi-devel bison flex flex-devel net-tools wget

2. 设置Python软链接。

   1	ln -s /usr/bin/python2 /usr/bin/python