2015-06-21 16:41:38 -04:00
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<!--[metadata]>
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+++
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title = "logs"
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description = "The logs command description and usage"
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keywords = ["logs, retrieve, docker"]
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[menu.main]
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parent = "smn_cli"
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weight=1
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+++
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<![end-metadata]-->
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# logs
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Usage: docker logs [OPTIONS] CONTAINER
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Fetch the logs of a container
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-f, --follow=false Follow log output
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--since="" Show logs since timestamp
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-t, --timestamps=false Show timestamps
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--tail="all" Number of lines to show from the end of the logs
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NOTE: this command is available only for containers with `json-file` logging
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driver.
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The `docker logs` command batch-retrieves logs present at the time of execution.
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The `docker logs --follow` command will continue streaming the new output from
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the container's `STDOUT` and `STDERR`.
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Passing a negative number or a non-integer to `--tail` is invalid and the
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2015-07-03 09:50:06 -04:00
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value is set to `all` in that case.
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2015-06-21 16:41:38 -04:00
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The `docker logs --timestamp` commands will add an RFC3339Nano
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timestamp, for example `2014-09-16T06:17:46.000000000Z`, to each
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log entry. To ensure that the timestamps for are aligned the
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nano-second part of the timestamp will be padded with zero when necessary.
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The `--since` option shows only the container logs generated after
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a given date. You can specify the date as an RFC 3339 date, a UNIX
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timestamp, or a Go duration string (e.g. `1m30s`, `3h`). Docker computes
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the date relative to the client machine’s time. You can combine
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the `--since` option with either or both of the `--follow` or `--tail` options.
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