1.安装Erlang时openssl版本太低出错
---> Package erlang.x86_64 0:22.0.7-1.el7 will be installed
--> Processing Dependency: libcrypto.so.10(OPENSSL_1.0.2)(64bit) for package: erlang-22.0.7-1.el7.x86_64
--> Finished Dependency Resolution
Error: Package: erlang-22.0.7-1.el7.x86_64 (rabbitmq_erlang)
解决办法：升级openssl版本
http://rpmfind.net/linux/rpm2html/search.php?query=libcrypto.so.10(OPENSSL_1.0.2)(64bit)&submit=Search+
…&system=&arch=
下载安装包装上，重新安装erlang就好了
rpm -ivh openssl-libs-1.0.2k-16.el7.x86_64.rpm –force
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