I want Linux's OverlayFS to behave like AUFS when writing to a lower file.  I want it to write through to the lower directory.  For example, I have two files named L/lower and U/upper.mount -t overlay -o lowerdir=L,upperdir=U,workdir=W overlay XThis merges the two files into a single OverlayFS directory named X.  So now they're accessible as X/lower and X/upper.Then I modify the lower file through the OverlayFS directory.  This is where it misbehaves on me:echo 'This is a modification' >> X/lowerIt does not actually modify the lower file L/lower.  Instead it creates a new upper file called U/lower and writes my modification there.  This is not what I want.  I want X to serve as a convenient, single access point for editing purposes.How can I make the modification to X/lower write through to L/lower?
How to modify a lower file through an OverlayFS directory?
overlayfs