raw:tldr:7460a

This command is used to create a device file named "raw" in the /dev/raw directory, with the help of the argument passed to the script (denoted as $1) appended to the end of the file name. Additionally, the script also passes the argument "-dev-block_device" to the command.

Here's a breakdown of the components:

• raw: It represents the command or utility being executed. In this case, it is the "raw" utility, which is used to create raw device files.
• /dev/raw/: It is the directory where the raw device file will be created. "/dev/raw" is a specific directory in the Linux filesystem dedicated to raw devices.
• raw${1}: This denotes the name of the raw device file that will be created. The ${1} is a shell variable that will be replaced with the first argument passed to the script when it is called.
• ${-dev-block_device}: This represents the second argument passed to the script, which is intended to specify the block device that will be associated with the raw device. The -dev part implies that the device will be considered as a block device.

Overall, this command is typically used to create a raw device file and associate it with a specific block device, providing a way for applications to directly access the block device at a low-level, without any filesystem or buffering performed by the operating system.