busybox compilation for self ref. Not to be run as a shell script

Busybox-compilation.txt

sudo apt-get install libncurses5-dev libncursesw5-dev unzip lzop u-boot-tools

#in a clean working directory donwload busybox
wget https://busybox.net/downloads/busybox-1.28.3.tar.bz2
tar xvjf busybox-1.28.3.tar.bz2
#downlaod linaro toolchain
wget https://releases.linaro.org/components/toolchain/binaries/latest/arm-linux-gnueabihf/gcc-linaro-7.2.1-2017.11-x86_64_arm-linux-gnueabihf.tar.xz
tar xvf gcc-linaro-7.2.1-2017.11-x86_64_arm-linux-gnueabihf.tar.xz
#downlaod linux kernel source
wget https://github.com/beagleboard/linux/archive/4.4.zip
unzip 4.4.zip
wget ftp://ftp.denx.de/pub/u-boot/u-boot-2018.05.tar.bz2	
tar xvjf u-boot-2018.05.tar.bz2

#add toolchain binaries to path
PATH=$PATH:`pwd`/gcc-linaro-7.2.1-2017.11-x86_64_arm-linux-gnueabihf/bin/

pushd u-boot-2018.05.tar.bz2
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- distclean
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_boneblack_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j4
popd

pushd busybox-1.28.3
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- defconfig
# to change to static in menuconfig: busybox  settings ->  build busy box as static binary
#make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- CONFIG_PREFIX=`pwd`/build -j8 install
popd

pushd linux-4.4
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- distclean
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bb.org_defconfig
#make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- uImage dtbs LOADADDR=0x80008000 -j4
  # uImage - make kernel uboot image
  # dtbs - include device tree blob
  # LOADADDR - address header for uboot to load zimage in to ram
  # j4 - build on 4 threads
  # uImage will be in arch/arm/boot/uImage
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- modules -j4
  # builds all the loadable kernel modules marked as M in defconfig. with a file ext .ko
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=<path_to_rfs> modules_install
  # install all modules in the root file system
popd

apt install nfs-kernel-server
echo "/home/sai/BeagleBone/netfs 192.168.7.2(rw,sync,no_root_squash,no_subtree_check)" >> /etc/exports
exportfs -a
exportfs -rv
service nfs-kernel-server restart

#add this is /etc/network/interfaces in order to set a static Ip over beaglebone ethernet connection
auto enp1s0
iface enp1s0 inet static
	address 192.168.7.1
	netmask 255.255.255.0
	network 192.168.7.0
	gateway 192.253.7.1
	dns-nameservers 8.8.8.8

 sudo service networking restart