hexdump:tldr:dd142

The command "hexdump ${filename}" is used to display the hexadecimal (base-16) representation of the content in the specified file.

Here's an explanation of each component:

1. "hexdump": This is the command itself, used to display hexadecimal data.
2. "${filename}": This is a variable that represents the filename or path of the file you want to display in hexadecimal format. The "$" sign before the variable name indicates that it is a variable, and the curly braces "{}" enclose the variable name.

When you run this command in a terminal or command prompt, it will read the specified file and output the hexadecimal representation of its contents. Each line of the output typically shows a specific number of bytes, followed by the hexadecimal values and ASCII characters corresponding to those bytes. This can be useful for examining binary or non-text files, as hexadecimal representation allows you to see the exact byte values in the file.