# Regular Meeting (2021.11.22)

* About prebuild image file for rootfs
> There are two types of formats being used for root filesystems.
> Before Vivado/SDK version 2013.1,
> Linux for Zynq AP SoC used an initial ramdisk/initrd (ramdisk.image.gz);
> Since then, the Zynq uses initramfs.
> MicroBlaze and PowerPC are using initramfs(initramfs.cpio.gz).
[link is here](https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842473/Build+and+Modify+a+Rootfs)

* Most importan is here:

# Create initramfs with some folder
sh -c 'cd tmp_mnt/ && find . | cpio -H newc -o' | gzip -9 > new_initramfs.cpio.gz

* [why `find`?](https://mywiki.wooledge.org/BashPitfalls#for_f_in_.24.28ls_.2A.mp3.29)
* [*Busybox*](https://en.wikipedia.org/wiki/BusyBox) seems can be integrated into *initramfs* (researching...)
* Combind above script into my makefile (researching...)

###### tags: `Regular Meeting` `DeWei`