I have a USB stick with a live system. One file in this has got the wrong md5 sum. The ISO image from which it was made had the right md5 sum.
I want to rename the broken file such that it does not harm any longer and put a known good replacement into the same directory.
Of course I could make a new stick from the onset. But my special stick has more than one partition and I want to keep the other partitions unchanged. Also there are some other files in the live system, which I would like to modify (and of course adapt the entries with the md5sums of the file md5sum.txt to the changed files). So my first question is just a practice for the second step.
I have already tried to mount the device (/dev/sdb1 in my case) in -w mode, but it refuses to do so because of the iso9660 filesystem.
