Final answer:
The file that is a pointer to the system's default system shell is the etc-passwd file.
Step-by-step explanation:
The file that is a pointer to the system's default system shell is the etc-passwd file.
-etc-passwd is a text file that contains important information about user accounts in a Unix-like operating system. Each line in the file represents a user account and contains several fields of information, including the user's default shell.
The default shell for a user is specified in the etc-passwd file under the field for the user's account.