running ethereum
#ethereum 2.0 #zinken #testnet @ethnimbus

Few more details on this (thread):
Running on #RaspberryPi 4B 4GB RAM, 512 GB SSD
200/100 Mbps fibre broadband

Initial issues:
- import of 10 validator keys consistently fails after 9 are imported with error "out of memory"
- client is picky about access permissions for validator keystores and secrets and aborts if they're too liberal

Therefore, set the following permissions:
$ chmod 600 build/data/shared_zinken_0/secrets/*
$ chmod 700 build/data/shared_zinken_0/validators/0x*
$ chmod 600 keystore.json (do this for each validator)

Note that this is likely a bug in nimbus since those files, along with their initial permission, are created by the client itself during key import