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$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - OK |
| Note |
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The apt-key command is scheduled to be deprecated. The abolishment date has not yet been determined, but please consider alternative methods on your own. |
| Info |
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Use -x option if you need a proxy server to connect to the Internet. （Change URL and port number for the proxy server according to the proxy server you are using.) $ curl -x http://proxy.example.com:8080/ -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - |
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