1. 下载Ubuntu Coremkdir ~/rootfs && cd ~/rootfsubuntu-base-16.04.6-base-armhf.tar.gzIndex of /ubuntu-cdimage/ubuntu-base/releases/16.04.6/release/ | 清华大学开源软件镜像站 | Tsinghua Open Source MirrorIndex of /ubuntu-cdimage/ubuntu-base/releases/16.04.6._ubuntu根文件系统...