So close...
ubuntu@vps-1bd97cc6:~/hive/steemsmartcontracts$ tail -1000 /home/ubuntu/.pm2/logs/cervisia-out.log | grep "Hive blockchain is"
2021-03-28 17:50:47 info: [Streamer] head_block_number 52536920 currentBlock 52536259 Hive blockchain is 661 blocks ahead
ubuntu@vps-1bd97cc6:~/hive/steemsmartcontracts$ tail -1000 /home/ubuntu/.pm2/logs/cervisia-out.log | grep "Hive blockchain is"
2021-03-28 17:51:18 info: [Streamer] head_block_number 52536930 currentBlock 52536487 Hive blockchain is 443 blocks ahead