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Unix

Unix
Which of the following commands is used to rename a file?

remove
ren
rename
mv

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Unix
Which of the following is not a communication command.

grep
mesg
write
mail

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Unix
Which command is used to change protection mode of files starting with the string emp and ending with 1,2, or 3?

chmod u+r ??? emp
chmod u+x emp[1-3]
chmod 777 emp*
chmod 222 emp?

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Unix
Which symbol is used to separate more than one command in the same command line?

;
:
#
$

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Unix
Which command is used to create a directory?

mkdir
None of these
md
crdir
cr

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Unix
Which of the following commands is used to remove files?

rm
delete
None of these
dm
erase

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