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@@ -18,10 +18,18 @@ Register or log in to a Docker Registry located on the specified
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do not specify a `SERVER`, the command uses Docker's public registry located at
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`https://registry-1.docker.io/` by default. To get a username/password for Docker's public registry, create an account on Docker Hub.
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+`docker login` requires user to use `sudo` or be `root`, except when:
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+
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+1. connecting to a remote daemon, such as a `docker-machine` provisioned `docker engine`.
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+2. user is added to the `docker` group. This will impact the security of your system; the `docker` group is `root` equivalent. See [Docker Daemon Attack Surface](https://docs.docker.com/articles/security/#docker-daemon-attack-surface) for details.
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+
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You can log into any public or private repository for which you have
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credentials. When you log in, the command stores encoded credentials in
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`$HOME/.docker/config.json` on Linux or `%USERPROFILE%/.docker/config.json` on Windows.
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+> **Note**: When running `sudo docker login` credentials are saved in `/root/.docker/config.json`.
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+>
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+
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# OPTIONS
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**-e**, **--email**=""
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Email
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@@ -49,3 +57,4 @@ April 2014, Originally compiled by William Henry (whenry at redhat dot com)
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based on docker.com source material and internal work.
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June 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
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April 2015, updated by Mary Anthony for v2 <mary@docker.com>
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+November 2015, updated by Sally O'Malley <somalley@redhat.com>
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Sally O'Malley