resizing knoppix-data.img

[kl522]

Actually you did not answer my question (2) directly, but from the flow of the sentences, it appears to me you are overwritting knoppix-data while you are having it mounted. Since the whole operation is surrounded on increasing the size of knoppix-data, it might be safe to perform it while having knoppix-data mounted, but personally I am not sure it will be 100% safe.

[koolb]

Actually you did not answer my question (2) directly, but from the flow of the sentences, it appears to me you are overwritting knoppix-data while you are having it mounted. Since the whole operation is surrounded on increasing the size of knoppix-data, it might be safe to perform it while having knoppix-data mounted, but personally I am not sure it will be 100% safe.

and actively using the file. Just like you can mv a running exectutable to another file of the same name, you can do this with files tied to a loopback. I think the mv will create a hard link to the new file then remove the old file. All open file descriptors will still point to the correct data blocks.

I ran this script as knoppix on my system and had no issues. Until I rebooted, the kernel still sees knoppix-data.bak content exactly as it was when it was before the mv.