Which command assists in displaying block device information to the user?

The command that assists in displaying block device information to the user is "lsblk." This command is specifically designed to list all available block devices in a hierarchical manner, showing how devices such as partitions and their mount points relate to each other. When executed, it provides critical information such as device names, sizes, types, and mount points, making it easy for users to understand the layout and status of storage devices on their system.

Other commands, while they serve different purposes, do not provide the same detailed insight into block devices. For instance, "lpr" is used for sending files to the printer, "lpq" is for checking the printer queue, and "dmesg" is primarily used to examine the kernel ring buffer, which includes system messages related to device initialization among other things, but it does not neatly summarize block device information like "lsblk" does.