30 lines
1.1 KiB
Markdown
30 lines
1.1 KiB
Markdown
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---
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description: Upgrade Docker on a machine
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keywords: machine, upgrade, subcommand
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title: docker-machine upgrade
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---
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Upgrade a machine to the latest version of Docker. How this upgrade happens
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depends on the underlying distribution used on the created instance.
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For example, if the machine uses Ubuntu as the underlying operating system, it
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runs a command similar to `sudo apt-get upgrade docker-engine`, because
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Machine expects Ubuntu machines it manages to use this package. As another
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example, if the machine uses boot2docker for its OS, this command downloads
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the latest boot2docker ISO and replace the machine's existing ISO with the
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latest.
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```bash
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$ docker-machine upgrade default
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Stopping machine to do the upgrade...
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Upgrading machine default...
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Downloading latest boot2docker release to /home/username/.docker/machine/cache/boot2docker.iso...
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Starting machine back up...
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Waiting for VM to start...
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```
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> **Note**: If you are using a custom boot2docker ISO specified using
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> `--virtualbox-boot2docker-url` or an equivalent flag, running an upgrade on
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> that machine completely replaces the specified ISO with the latest
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> "vanilla" boot2docker ISO available.
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