国内のミラーソースのUbuntuのapt-getのソースを変更します。

• sudoのCPの/etc/apt/sources.list /etc/apt/sources.list.bak
• sudoのvimのの/etc/apt/sources.list
  deb http://mirrors.aliyuncs.com/ubuntu/ bionic main restricted universe multiverse deb http://mirrors.aliyuncs.com/ubuntu/ bionic-security main restricted universe multiverse deb http://mirrors.aliyuncs.com/ubuntu/ bionic-updates main restricted universe multiverse deb http://mirrors.aliyuncs.com/ubuntu/ bionic-proposed main restricted universe multiverse deb http://mirrors.aliyuncs.com/ubuntu/ bionic-backports main restricted universe multiverse deb-src http://mirrors.aliyuncs.com/ubuntu/ bionic main restricted universe multiverse deb-src http://mirrors.aliyuncs.com/ubuntu/ bionic-security main restricted universe multiverse deb-src http://mirrors.aliyuncs.com/ubuntu/ bionic-updates main restricted universe multiverse deb-src http://mirrors.aliyuncs.com/ubuntu/ bionic-proposed main restricted universe multiverse deb-src http://mirrors.aliyuncs.com/ubuntu/ bionic-backports main restricted universe multiverse
• ファイル名を指定して実行須藤はapt-getを更新