教程链接：https://www.yuque.com/wangdd/opensips/sngrep#gbX9j
centos安装sngrep编辑yum源
vim /etc/yum.repos.d/irontec.repo 写入
[irontec] name=Irontec RPMs repository baseurl=http://packages.irontec.com/centos/$releasever/$basearch/
安装
rpm --import http://packages.irontec.com/public.key yum install -y sngrep
