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____ command allows superuser to communicate with users.

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____ command allows superuser to communicate with users.

(a) comm

(b) cron

(c) date

(d) wall

I got this question in an international level competition.

The above asked question is from Administrator Specific Commands and Privileges topic in chapter Essential Shell Programming of Unix

1 Answer

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Best answer
Right answer is (d) wall

Explanation: The wall command can be used by the administrator to address all users simultaneously. For example,

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