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I have an OpenWrt-based system on an embedded device.
Rootfs is mounted as overlayfs

# mount
mtd:ubi_rootfs on /rom type squashfs (ro,relatime)
overlayfs:/overlay on / type overlay (rw,noatime,lowerdir=/,upperdir=/overlay/upper,workdir=/overlay/work)
...

There is a number of changed files:

# find /overlay/upper/ -type f
/overlay/upper/etc/passwd
/overlay/upper/etc/sysstat/sysstat
/overlay/upper/etc/bluetooth/csr8x11-mac.psr
/overlay/upper/etc/shadow
/overlay/upper/etc/ethers
...

I need to revert them

kyb
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1 Answers1

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Remove file from overlay, and then remount rootfs.

rm /overlay/upper/etc/*
mount -oremount /
kyb
  • 115
  • 6