Grant writing permission to /snap devices

Question

I installed blender with snap and I want the app to use blender's numix-circle-icon so I tried to replace /snap/blender/47/blender.svg but I have this error with sudo: File systeme is only readable I test to chmod it but it make same error. I found those directory are mounted device from /var/lib/snapd/snaps/ So I ask you, how to grant writing on snap devices & them mounted dirs?

Answer 1

There is a snap application called 'overlay' - you can install it via Snap Store. This little app makes it possible to remount a snap read/write. However, it needs to be repeated every time the system starts up, so you have to write a script that is called on system startup, which remounts the particular snap r/w using 'overlay' and copies the needed files there. (Actually you don't have to use the 'overlay' application, you can remount a snap r/w using just 'mount' command with overlayfs, but that application simplifies it).