Which of the following is not a communication command.
A. write
B. mesg
C. mail
D. grep
E. None of the above
Answer: Option D
Solution(By Examveda Team)
In Unix, grep is not a communication command. It is a powerful utility used for searching patterns in files. It stands for "global regular expression print".On the other hand, the other options are indeed communication commands:
write: Used to send messages to another user logged in on the same system.
mesg: Used to control whether other users can send messages to you.
mail: Used to send and receive email messages.
So, Option D: grep is not a communication command.
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A. ^pat
B. $pat
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E. None of the above
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A. cp chap?? progs
B. cp chap* progs
C. cp chap[12] /progs/*.*
D. cp chap?? /progs/*
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