Explainer
Find the configuration file your Nginx instance uses
Match the running Nginx binary and startup options, inspect its includes, and distinguish on-disk settings from an accepted reload.
Explainer
Validate a Logstash configuration before starting it
Run config.test_and_exit, check the exit status, and follow syntax validation with representative event and delivery tests.
Explainer
Parse log time into @timestamp with the Logstash date filter
Extract a source timestamp, choose the matching date format, and handle time zones and failed parses explicitly.
Explainer
Extract a filename from a Logstash file path
Compare grok extraction with split and Ruby, preserve the original path, and account for ECS and platform-specific separators.
Technical guide
Can Logstash report the source file line number?
Understand why a file input does not emit physical line numbers, and when a single-worker event counter is useful only as a diagnostic sequence.
Explainer
Remove nested JSON fields in Logstash
Use bracket references for nested fields, remove raw copies of sensitive values, and verify the event after parsing.
Explainer
Configure a Logstash persistent queue
Enable on-disk buffering, size it for an outage, and understand checkpoint durability, duplicate delivery, and backpressure.
Explainer
Fix an Apache timestamp that Logstash does not parse
Check Grok field names, date patterns, failure tags, and time zones when Apache log timestamps do not replace Logstash @timestamp.
Explainer
Configure Loki to store logs in S3
Set up TSDB v13 with S3 in Loki 3.x, understand local WAL requirements, and adapt the configuration for an S3-compatible endpoint.
Technical guide
Set the upstream of an existing Git branch
Connect a local branch to a remote-tracking branch, verify the setting, and understand when push still needs an explicit destination.
Technical guide
Resolve diverged local and remote Git branches
Inspect both sides of a divergence, choose merge or rebase deliberately, and preserve recovery points before discarding history.
Technical guide
Merge a hotfix into a feature branch
Bring a hotfix into ongoing development, choose merge or cherry-pick, and check for conflicts beyond the changed lines.