jetson xavier nx下换国内源，步骤如下：
#!/bin/bash cp /etc/apt/sources.list /etc/apt/sources.list.bak #换源 echo "#中科大源 deb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-updates main restricted universe multiverse deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-updates main restricted universe multiverse deb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-security main restricted universe multiverse deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-security main restricted universe multiverse deb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-backports main restricted universe multiverse deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-backports main restricted universe multiverse deb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic main universe restricted deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic main universe restricted" >/etc/apt/sources.list
