Step

apt update -y

apt upgrade -y

apt install -y ack antlr3 asciidoc autoconf automake autopoint binutils bison build-essential \
  bzip2 ccache cmake cpio curl device-tree-compiler ecj fastjar flex gawk gettext gcc-multilib g++-multilib \
  git gperf haveged help2man intltool lib32gcc1 libc6-dev-i386 libelf-dev libglib2.0-dev libgmp3-dev libltdl-dev \
  libmpc-dev libmpfr-dev libncurses5-dev libncursesw5 libncursesw5-dev libreadline-dev libssl-dev libtool lrzsz \
  mkisofs msmtp nano ninja-build p7zip p7zip-full patch pkgconf python2.7 python3 python3-pip python3-ply \
  python-docutils qemu-utils re2c rsync scons squashfs-tools subversion swig texinfo uglifyjs upx-ucl unzip \
  vim wget xmlto xxd zlib1g-dev

adduser hi

cd /home/hi

git clone --branch "openwrt-18.06-k5.4" --single-branch "https://github.com/immortalwrt/immortalwrt" "immortalwrt"

git clone https://github.com/ThingsWhy/nanopi-r2s-openwrt.git

chown -R hi:hi "immortalwrt"

chown -R hi:hi "nanopi-r2s-openwrt"

cd /

su hi

screen -S hello

cd /home/hi/immortalwrt

./scripts/feeds update -a && ./scripts/feeds install -a

patch -p1 < "/home/hi/nanopi-r2s-openwrt/patches/1806-modify_for_r2s.patch"

cp -f "/home/hi/nanopi-r2s-openwrt/configs/1806-seed.config" ".config"

make defconfig

make -j1 V=s

## ./scripts/diffconfig.sh > 1806-seed.config