Unit redis-server.service is masked.

 

 

http://stackoverflow.com/questions/40317106/failed-to-start-redis-service-unit-redis-server-service-is-masked

systemctl unmask  redis-server.service

 

 

 https://redis.io/topics/quickstart

 

 

 service redis-server  start

Failed to start redis-server.service: Unit redis-server.service is masked.