以下是适用于不同 RK 系列设备的 Ubuntu 系统的默认镜像源配置。这些镜像源可以替换到主机的 /etc/apt/sources.list 文件中，以优化软件包的下载速度和更新效率。
RK3399系列 Ubuntu18.04
deb https://mirrors.huaweicloud.com/ubuntu-ports/ bionic main restricted universe multiverse
deb-src https://mirrors.huaweicloud.com/ubuntu-ports/ bionic main restricted universe multiverse
deb https://mirrors.huaweicloud.com/ubuntu-ports/ bionic-security main restricted universe multiverse
deb-src https://mirrors.huaweicloud.com/ubuntu-ports/ bionic-security main restricted universe multiverse
deb https://mirrors.huaweicloud.com/ubuntu-ports/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.huaweicloud.com/ubuntu-ports/ bionic-updates main restricted universe multiverse
RK3368/RK3588系列 Ubuntu20.04
deb http://ports.ubuntu.com/ubuntu-ports focal main restricted universe multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports focal main restricted universe multiverse
deb http://ports.ubuntu.com/ubuntu-ports focal-updates main restricted universe multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports focal-updates main restricted universe multiverse
deb http://ports.ubuntu.com/ubuntu-ports focal-backports main restricted universe multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports focal-backports main restricted universe multiverse
deb http://ports.ubuntu.com/ubuntu-ports focal-security main restricted universe multiverse
deb-src http://ports.ubuntu.com/ubuntu-ports focal-security main restricted universe multiverse
deb http://archive.canonical.com/ubuntu focal partner
deb-src http://archive.canonical.com/ubuntu focal partner