[yocto] How /etc/passwd packed into my final image

[Amit Tomer]

I wanted to modify the content of /etc/passwd but don't know how
/etc/passwd files is packed into final image

After the build process ,passwd file goes to

"tmp/work/k2-poky-linux-gnueabi/image-k2/1.0-r0/rootfs/etc/passwd"

this loaction

Now I see image-k2.bb file but could not find any rule that will pack
passwd file to
final image.

Can anybody how it is packed and way to modify it.

Thanks
Amit