SquashFS was simply not designed to be read-write. To edit the contents, even something as simple as changing file permissions, cannot be done through a simple remount. Your options are: Rebuild the SquashFS file system. The following resources should be helpful: Modifying a squashfs; How to modify squashfs image; Use OverlayFS to save changes Here's what worked for me on OpenWRT 22.03.2 with SquashFS. 1. Flash image to SD as normal with the firmware selector (I added packages to mine) 2. ssh into router 3. "opkg update && opkg install cfdisk resize2fs" 4. "cfdisk /dev/mmcblk0" 5. Create a NEW PRIMARY partition in the free space at the end. You could mount them with fuse-zip or archivemount and then create the squashfs file from the mount point. For example, this would work for a zip file: $ mkdir /tmp/zmnt $ fuse-zip -r /path/to/file1.zip /tmp/zmnt $ mksquashfs /tmp/zmnt /path/to/file1.squashfs $ fusermount -u /tmp/zmnt 1. You have to set the offset where the squashfs is. Usage: dd [OPERAND] or: dd OPTION Copy a file, converting and formatting according to the operands. bs=BYTES read and write up to BYTES bytes at a time cbs=BYTES convert BYTES bytes at a time conv=CONVS convert the file as per the comma separated symbol list count=N copy only N input SquashFS is a Linux operated compressed read-only file system wherein the purpose of this application is for read-only use; archive use, especially with formats like .tar and .gz; as well as for constrained block devices needing low overhead like embedded systems. Since SQFS files are bootable disk image files, they act as physical disks which Where can I find the SquashFS file extension? SQUASHFS files are sometimes found within Linux installation packages. NOTE: Squashfs files more commonly use the .SFS extension. Open over 400 file formats with File Viewer Plus. Free Download The FileInfo.com team has independently researched the Squashfs File System file format and Windows and After update to Manjaro KDE Plasma 21.1.6 , I can not install apps from snap and installed apps don’t work. when I want to install an app it show this error: System does not fully support snapd: cannot mount squashfs image using "squashfs": mount: /tmp/sanity-mountpoint-656829262: mount failed: Operation not permitted. I have tried re installation of snap several time with different kernels A squashfs archive differs from most other kinds in that it is a file-system. If you've ever booted a linux live disc then you've very likely already seen this in action - very nearly all of these work by mounting a squashfs archive as their root file-system. squashfs is supported in vanilla linux kernels since version 2.6.34. tqEKxJz.