tldr/pages/common/kcat.md

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# kcat
> Apache Kafka producer and consumer tool.
> More information: <https://github.com/edenhill/kcat>.
- Consume messages starting with the newest offset:
`kcat -C -t {{topic}} -b {{brokers}}`
- Consume messages starting with the oldest offset and exit after the last message is received:
`kcat -C -t {{topic}} -b {{brokers}} -o beginning -e`
- Consume messages as a Kafka consumer group:
`kcat -G {{group_id}} {{topic}} -b {{brokers}}`
- Publish message by reading from `stdin`:
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` echo {{message}} | kcat -P -t {{topic}} -b {{brokers}}`
- Publish messages by reading from a file:
`kcat -P -t {{topic}} -b {{brokers}} {{path/to/file}}`
- List metadata for all topics and brokers:
`kcat -L -b {{brokers}}`
- List metadata for a specific topic:
`kcat -L -t {{topic}} -b {{brokers}}`
- Get offset for a topic/partition for a specific point in time:
`kcat -Q -t {{topic}}:{{partition}}:{{unix_timestamp}} -b {{brokers}}`