Answer:
You should use an effective password cracker.
Explanation:
Since the system administrator decided to quit unexpectedly and apparently, he changed the server password and no one knows what it is. What you might do in this type of situation is to use an effective password cracker.
A password cracker can be defined as a software application or program used for retrieving passwords from stored locations or computer data systems. This simply means that, a password cracker is used to recover passwords in order to gain access to a computer system that is protected by authentication.
Some examples of commonly used passwords cracker are ElcomSoft, Aircrack, Hashcat, John the Ripper, Hydra, Cain and Abel, DaveGrohl, Ophcrack etc.
