[yocto] Make one directory writeable

[Josef Holzmayr]

Hi Bhupendra,

On Wed, Feb 13, 2019 at 12:51:17PM +0530, Bhupendra Singh wrote:
> Hello 
> 
> I have built core-image-minimal  with read only rootfs  then now  I want to
> make one directory (like /mnt) writable. 
> 
> Is it possible to make one directory writeable in read only rootfs if yes
> ,please tell me how can I do same.   

This is not exactly yocto specific, general linux concepts apply. You
can use a secondary, tertiary, ... partition or starage device and then
mount that as read-write. But it always has to be a seperate filesystem.
There is no way to make only one path of a given filesystem RW, it
always means that the whole filesystem is writeable.

Greetz
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Amtsgericht Ingolstadt - GmbH: HRB 191328 - KG: HRA 170363
Geschäftsführer: Dr.-Ing. Michael Sorg, Dipl.-Ing. Franz Sorg
USt-IdNr.: DE 128592548