this is in LINUX

Match the shell objects or features with the definition. Command Filter A. A list of previous commands B. The smallest unit of parsing C. A file containing a sequence of executable - Program Token History Utility Built-in instructions D. A program that provides service to the user E. A directive to the shell typed at the prompt F. A command that is built into the shell G. A command that can take its input from stdin and send its output to stdout