How to find the logs of my Netdata Agent

General
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To find the logs of your Netdata Agent, follow our documentation. To show them in the terminal for deugging purposes use: less /var/log/netdata/error.log.

When searching for a specific keyword, you can use grep to only output the lines that have that keyword, like grep <keyword> /var/log/netdata/error.log.

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To complement this awesome tip, I will also suggest users to use the option -w to get a more specific information, for example,

bash-5.1$ grep alert /var/log/netdata/error.log 
2021-03-10 14:15:21: go.d ERROR: prometheus[alertmanager_github_webhook_receiver_local] Get "http://127.0.0.1:9393/metrics": dial tcp 127.0.0.1:9393: connect: connection refused
2021-03-10 14:15:21: go.d ERROR: prometheus[alertmanager_github_webhook_receiver_local] check failed
2021-03-10 14:15:21: go.d ERROR: prometheus[alertsnitch_local] Get "http://127.0.0.1:9567/metrics": dial tcp 127.0.0.1:9567: connect: connection refused
2021-03-10 14:15:21: go.d ERROR: prometheus[alertsnitch_local] check failed
2021-03-10 14:15:22: go.d ERROR: prometheus[github_vulnerability_alerts_exporter_local] Get "http://127.0.0.1:9597/metrics": dial tcp 127.0.0.1:9597: connect: connection refused
2021-03-10 14:15:22: go.d ERROR: prometheus[github_vulnerability_alerts_exporter_local] check failed
2021-03-10 14:15:22: go.d ERROR: prometheus[alertmanager_silences_exporter_local] Get "http://127.0.0.1:9666/metrics": dial tcp 127.0.0.1:9666: connect: connection refused
2021-03-10 14:15:22: go.d ERROR: prometheus[alertmanager_silences_exporter_local] check failed
2021-03-10 14:15:22: go.d ERROR: prometheus[phabricator_webhook_for_alertmanager_local] Get "http://127.0.0.1:8292/metrics": dial tcp 127.0.0.1:8292: connect: connection refused
2021-03-10 14:15:22: go.d ERROR: prometheus[phabricator_webhook_for_alertmanager_local] check failed
2021-03-10 14:15:22: go.d ERROR: prometheus[telegram_bot_for_alertmanager_local] Get "http://127.0.0.1:9087/metrics": dial tcp 127.0.0.1:9087: connect: connection refused
2021-03-10 14:15:22: go.d ERROR: prometheus[telegram_bot_for_alertmanager_local] check failed
2021-03-10 14:15:22: go.d ERROR: prometheus[jiralert_local] Get "http://127.0.0.1:9097/metrics": dial tcp 127.0.0.1:9097: connect: connection refused
2021-03-10 14:15:22: go.d ERROR: prometheus[jiralert_local] check failed
bash-5.1$ grep -w alert /var/log/netdata/error.log 
bash-5.1$

As it is possible to see on this example, thanks the fact I did not have any message with alert word, the others were ignored. This is useful to look for plugin information.