Hex dump is a hexadecimal view (on screen or a printout) of computer data, from RAM or from a file or storage device. Each byte (8-bits) is represented as a two-digit hexadecimal number. Hex dumps are commonly organized into rows of 8 or 16 bytes, sometimes separated by whitespaces. Some hex dumps have the hexadecimal memory address at the beginning and checksum byte at the end of each line.
Although the name implies the use of base-16 output, options may be available for base-8 (octal) or base-10 (decimal) output. Some common names for this program function are hexdump and od.