Compression Level Mksquashfs

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http://unix.stackexchange.com – Here I'm trying to create a squashfs filesystem but the resulting image is bigger than the original version and not because I added a file or anything as I only modified some configuration files. What I'm trying to do is modify the existing squashfs filesystem on a live usb and delete some info to start the OS in a login shell. Since I fixed an amount of space to the EXT4 partition I need the modified squashf to have the same size as the original. I can do the changes while the live system is running but since I'm making a script to automate this process I need to do it before creating the li (HowTos)