|  | @@ -81,6 +81,32 @@ ENV LANG en_US.utf8
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				|  |  |  ## `/etc/apt/sources.list`
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				|  |  |  
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				|  |  | +### `ubuntu:18.04`
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				|  |  | +
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				|  |  | +```console
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				|  |  | +$ docker run ubuntu:18.04 grep -v '^#' /etc/apt/sources.list
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				|  |  | +
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				|  |  | +deb http://archive.ubuntu.com/ubuntu/ bionic main restricted
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				|  |  | +
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				|  |  | +deb http://archive.ubuntu.com/ubuntu/ bionic-updates main restricted
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				|  |  | +
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				|  |  | +deb http://archive.ubuntu.com/ubuntu/ bionic universe
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				|  |  | +deb-src http://archive.ubuntu.com/ubuntu/ bionic universe
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				|  |  | +deb http://archive.ubuntu.com/ubuntu/ bionic-updates universe
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				|  |  | +deb-src http://archive.ubuntu.com/ubuntu/ bionic-updates universe
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				|  |  | +
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				|  |  | +deb http://archive.ubuntu.com/ubuntu/ bionic multiverse
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				|  |  | +deb http://archive.ubuntu.com/ubuntu/ bionic-updates multiverse
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				|  |  | +
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				|  |  | +deb http://archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
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				|  |  | +
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				|  |  | +
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				|  |  | +deb http://security.ubuntu.com/ubuntu/ bionic-security main restricted
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				|  |  | +deb http://security.ubuntu.com/ubuntu/ bionic-security universe
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				|  |  | +deb-src http://security.ubuntu.com/ubuntu/ bionic-security universe
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				|  |  | +deb http://security.ubuntu.com/ubuntu/ bionic-security multiverse
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				|  |  | +```
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				|  |  | +
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				|  |  |  ### `ubuntu:16.04`
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				|  |  |  
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				|  |  |  ```console
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