How to identify Raspberry Pi image?

Question

Operating Systems

An image from the Raspberry Pi came to me, but I don’t know what it is, a system image or a recovery disk.
Tell me, dear experts, by what signs and what utilities can you determine its purpose?

Answer 1

usually this is an image for writing dd to a USB flash drive.
those. inside the partition table, mbr and file systems with OSes and other things, set file - everything will show.
try to mount via loop.