Linux and disk images
From time to time there is a need to take files on a device and convert these to something else.
First example, if you have installed media for a Linux OS on a flash disk, and you want to re-create an ISO file from this, the following may be useful.
Similarly, you may have a SD card or flash disk with a set of files, that you want to back up, you could copy the files to another device OR create a disk image that can be stored and later copied back on to an SD card for example.
Note: I have included links to the videos which are stored on my peer tube account.