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vendor/github.com/hyperhq/hypercli/docs/reference/commandline/login.md

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+<!--[metadata]>
++++
+title = "login"
+description = "The login command description and usage"
+keywords = ["registry, login, image"]
+[menu.main]
+parent = "smn_cli"
++++
+<![end-metadata]-->
+
+# login
+
+    Usage: docker login [OPTIONS] [SERVER]
+
+    Register or log in to a Docker registry server, if no server is
+	specified "https://index.docker.io/v1/" is the default.
+
+      -e, --email=""       Email
+      --help               Print usage
+      -p, --password=""    Password
+      -u, --username=""    Username
+
+If you want to login to a self-hosted registry you can specify this by
+adding the server name.
+
+    example:
+    $ docker login localhost:8080
+
+
+`docker login` requires user to use `sudo` or be `root`, except when: 
+
+1.  connecting to a remote daemon, such as a `docker-machine` provisioned `docker engine`.
+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/security/security/#docker-daemon-attack-surface) for details. 
+
+You can log into any public or private repository for which you have
+credentials.  When you log in, the command stores encoded credentials in
+`$HOME/.docker/config.json` on Linux or `%USERPROFILE%/.docker/config.json` on Windows.
+
+> **Note**:  When running `sudo docker login` credentials are saved in `/root/.docker/config.json`.
+>