Ok, this is Red5 on CentOS 7

How-to install Red5 server on CentOS 7
You asked - i did it.

First of all, you have to update the system
# yum update -y

Then, install openjdk 1.8.0
# yum install java-1.8.0-openjdk java-1.8.0-openjdk-devel -y

Install Red5 server on CentOS 6.7 (actual for summer 2015)

There are a lot of tutorials, but all of them are old and not correct. This is the fresh one.

1. First, we need to install openjdk.

# yum install java-1.8.0-openjdk java-1.8.0-openjdk-devel -y