Redis Pleaes update Quickstart Tutorial with more hints on installing on Red Hat Linux

The tutorial at https://redis.io/topics/quickstart says to run this command:

sudo update-rc.d redis_6379 defaults

The update-rc.d command does not exist on RHEL 7. For those who are new to both Redis and Red Hat Linux, it is not clear what the applicable alternatives are to this command.

Also, there is a script called utils/install-server.sh which is not mentioned at all.

Comment From: oranagra

@paolovalladolid feel free to make a PR to https://github.com/redis/redis-doc/pulls