The script can support you a base ubuntu rootfs, provide the following functions：
- username and boardname commission
- tiny xfce4 desktop environment
- use the tuna mirror sources.list
- chinese display and fonts support
- basic net tools
- xserver with 2d acceleration
- hardware decoder plugin named gstreamer-rockchip
- auto ethernet connect
- chinese timezone default set
sudo apt install qemu-user-static binfmt-support
the script support change username and boardname
the build env is named USERNAME and BOARDNAME
USERNAME=cqutprint BOARDNAME=rk3288 ./build-fs-base.sh