Answer:
For shadow passwords the shadow-utils package to be enabled
Explanation:
The shadow-utils package includes the necessary programs forconverting UNIX password files to the shadow password format, plusprograms for managing user and group accounts. The pwconv commandconverts passwords to the shadow password format. The pwunconv commandunconverts shadow passwords and generates a passwd file (a standardUNIX password file). The pwck command checks the integrity of passwordand shadow files. The lastlog command prints out the last login timesfor all users. The useradd, userdel, and usermod commands are used formanaging user accounts. The groupadd, groupdel, and groupmod commandsare used for managing group accounts.