Building my own filesystem to use with embedded kernel

Building my own filesystem to use with embedded kernel

This is the 4th and final step to build a working embedded system

1.- Toolchain
2.- Bootloader
3.- Kernel
4.- Root filesystem

Root Filesystem
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What we will be cover on this last step

1.- What is the most important things on the root filesystem

What is the most important things on the root filesystem
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As per my knowledge, the init program is essential to brindg life to the system
it will be usefull a shellm like bash, sh, tch, zsh etc,  the daemons to give services to the embedded, other also important thing 
is how to interact from the outside world with my embedded system:
in example:
- Network
- Secure Shell or telnet if you prefer
- trivial FTP client or server
- etc.

Here comes to life, the swiss army tool of the Linux embedded systems...  Busybox
Also it is possible to use a single /sbin/sh program
init=/bin/bash
or other as you prefer..!