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Unix

Unix
Which of command is used to copy a file?

tar
copy
None of these
cpio
cp

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

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Unix
Which command is used to terminate a process?

kill
shutdown
cancel
haltsys

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Unix
Which of the following commands is used to have a two-way communication with any person who is currently logged in?

None of these
write
mesg
mail
grep

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Unix
Which command will be used with vi editor to append text at end of line?

a
i
I
A
None of these

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Unix
Which of the following keys is used to overstrike a whole line?

v
u
C
R
None of these

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