Package: ntopng Version: 3.8+dfsg1-2.1
There is a system boot race between ntopng and redis-server because ntopng doesn't have the dependency in the systemd config (it is present in init.d but not systemd) root@ganges:~# systemctl status ntopng ... Jan 23 19:25:02 ganges ntopng[7891]: 23/Jan/2020 19:25:02 [Redis.cpp:111] ERROR: ntopng requires redis server to be up and running Jan 23 19:25:02 ganges ntopng[7891]: 23/Jan/2020 19:25:02 [Redis.cpp:112] ERROR: Please start it and try again or use -r Jan 23 19:25:02 ganges ntopng[7891]: 23/Jan/2020 19:25:02 [Redis.cpp:113] ERROR: to specify a redis server other than the default root@ganges:~# systemctl status redis-server ... Jan 23 19:25:03 ganges systemd[1]: Started Advanced key-value store. Note ntopng was started prior to redis-server on server boot. root@ganges:~# grep redis /etc/init.d/ntopng # Required-Start: $remote_fs $syslog redis-server # Required-Stop: $remote_fs $syslog redis-server root@ganges:~# grep redis /etc/systemd/system/multi-user.target.wants/ntopng.service root@ganges:~# An 'After=redis-server.service' would seem approprate in ntopng.service -- Dave