centos 下安装 Let’s Encrypt 永久免费 SSL 证书

功能

1. https证书，免费版，每三个月续签一次，可以用过脚本自动续签

安装

1. ssh登录到域名配置所在的主机（nginx，apache等）
2. 安装git yum -y install git
3. 输入 git clone https://github.com/letsencrypt/letsencrypt
4. cd letsencrypt
5. chmod x letsencrypt-auto
6. 安装证书:
   • ./letsencrypt-auto certonly --email [email protected] -d jenkins.jetbrains.org.cn
   • d参数后面对应的是域名，在执行的过程中，我遭遇了下面的报错：
     `Total size: 44 M
     Downloading Packages:
     Running rpmcheckdebug
     ERROR with rpmcheckdebug vs depsolve:
     libgdbm.so.2()(64bit) is needed by python-libs-2.6.6-66.el68.x8664
     ** Found 7 pre-existing rpmdb problem(s), 'yum check' output follows:
     4:perl-5.10.1-141.el67.1.x8664 has missing requires of libgdbm.so.2()(64bit)
     4:perl-devel-5.10.1-141.el67.1.x8664 has missing r