tab completion
Definition (in your own words) of the chosen keyword.
List any sites, books, or sources utilized when researching information on this topic. (Remove any filler text).
checksum
A checksum is a value used to verify the integrity of a file or a data transfer. In other words, it is a sum that checks the validity of data.
The wonderful thing called Google. Techterms.com was my best definition source.
Demonstration of the indicated keyword.
lab46:~$ md5sum minecraft.jar 8b193874fe1ad8a0d474b2be13eb00f5 minecraft.jar