- OS: CentOS Linux 7.4.1708 (Core)
- Product: Plesk Onyx 17.5.3 Update #44
I have followed this article to install Redis: Instruction - How to install latest Redis server
I would like to use it with Magento 2 for caching.
After following the step by step guide above, I got this:

After configuring my Magento 2 site to use Redis, I attempted to restart Reds with:
Code:
service redis-server restart
Redirecting to /bin/systemctl restart redis-server.service
Failed to restart redis-server.service: Unit not found.
Code:
Job for redis_6379.service failed because the control process exited with error code. See "systemctl status redis_6379.service" and "journalctl -xe" for details.
I run
Code:
redis-server &

I pointed to the redis.conf to the location on my server but this didn't resolve anything.
I attempted to start Redis with the command:
Code:
systemctl start redis_6379
Code:
Job for redis_6379.service failed because the control process exited with error code. See "systemctl status redis_6379.service" and "journalctl -xe" for details.
So I then run command to check the status of Redis:

What did I do wrong and how can I fix, please? Can anyone point me in the right direction even?
Thanks.