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____ command is used by the superuser for changing root’s password.

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____ command is used by the superuser for changing root’s password.

(a) pd

(b) password

(c) pswd

(d) pwd

I have been asked this question in a job interview.

This key question is from Administrator Specific Commands and Privileges in chapter Essential Shell Programming of Unix

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Best answer
The correct choice is (c) pswd

Explanation: The pswd command prompts for existing password when this command is used by a non-privileged user but when the same command is used by the superuser it behaves much leniently and doesn’t ask for the old password this time. For example,

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