More usefully is actually understanding why “sudo ls -la /var/lib/redis/*” doesn’t work. See this post of mine here.
In previous distributions that file would have been deleted as part of the “making read-only”. It was recently discovered (in that thread I just linked to) that there was an error in the build guide which leaves that file behind causing other issues (as per that other thread). Try removing it using:
sudo rm /var/lib/redis/dump.rdb
Ok, looks like once the folder was there, all it created in that folder was the .pid file (which is normally used to track what PID the process is running under) so it probably didn’t have any consequences beyond logging an error in syslog on service startup.
See how you go removing the dump.rdb file from /var/lib/redis.