tracehost is a bash script that parses a standard hosts files and generates an SVG. The script accepts a standard system hosts file format but actually it only cares about the first host or IP on a line. In fact any line format may be used as long as each line begins with something that can be pinged.
127.0.0.1 localhost # for local people 188.8.131.52 - google silobrighton.com # Zero waste
The image below is generated as a daily GitLab cron job. Hosts that don’t respond to pings are coloured red.