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34 lines
1.0 KiB
Markdown
34 lines
1.0 KiB
Markdown
---
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redirect_from:
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- /reference/commandline/port/
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description: The port command description and usage
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keywords:
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- port, mapping, container
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title: docker port
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---
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```markdown
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Usage: docker port CONTAINER [PRIVATE_PORT[/PROTO]]
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List port mappings or a specific mapping for the container
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Options:
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--help Print usage
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```
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You can find out all the ports mapped by not specifying a `PRIVATE_PORT`, or
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just a specific mapping:
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$ docker ps
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CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
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b650456536c7 busybox:latest top 54 minutes ago Up 54 minutes 0.0.0.0:1234->9876/tcp, 0.0.0.0:4321->7890/tcp test
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$ docker port test
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7890/tcp -> 0.0.0.0:4321
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9876/tcp -> 0.0.0.0:1234
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$ docker port test 7890/tcp
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0.0.0.0:4321
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$ docker port test 7890/udp
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2014/06/24 11:53:36 Error: No public port '7890/udp' published for test
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$ docker port test 7890
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0.0.0.0:4321
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