After installing redis on my machine I received the following error message:
redis-server.service: Can’t open PID file /var/run/redis/redis-server.pid (yet?) after start: No such file or directory
This message comes because redis refuses to start with disabled ipv6. To get it running you have to remove “::1” from “bind 127.0.0.1 ::1” in /etc/redis/redis.conf. Then redis starts as expected.