Something like unionfs/overlayfs, which are the magic allowing Linux Live CDs to "modify" files and directories stored on read-only medium. https://www.kernel.

Something like unionfs/overlayfs, which are the magic allowing Linux Live CDs to "modify" files and directories stored on read-only medium. https://www.kernel.org/doc/Documentation/filesystems/overlayfs.txt https://www.kernel.org/doc/Documentation/filesystems/overlay...