HASS.IO on Ubuntu Server crashes every 3 to 4 days

Please help. I have HASS.IO (106.2) running on an older laptop has Ubuntu Server, with addons for node red, influx, grafana, ssh. All seems to work well after a reboot; however after 3 to 4 days sometimes less. The frontend (Lovelace ) locks up and is unreachable. During the last occurrence I launched portainer and all the containers appeared to be healthy. Ultimately I restarted “homeassistant” and “hassio_supervisor” (with portainer), after this the front end was accessible; however node red was not functioning properly. I moved a flow slightly then redeployed the flow and all seemed well. The real problem here is that I don’t know how to begin digging into this problem. I guess I should start by getting all the log files off of the host machine, but I don’t know where they are located. Any and all help would be appreciated. Thanks in advance.