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Unix

Unix
Which of the following keys is used to delete the character beneath the cursor?

None of these
D
X
dd
x

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Unix
Which command is used with vi editor to move the cursor to the left?

k
i
j
None of these
h

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Unix
While working with mail command, which command is used to save mail in a separate file?

r
w
d
s

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Unix
Which command is used to set the three permissions for all the three categories of users of a file?

chgrp
chown
None of these
chusr
chmod

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Unix
Which command is used to count just the number of characters in a file?

wc -r
wc -c
wc - 1
wc -w

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Unix
Which command is used to terminate all processes in your own system except the login shell?

kill 1
cancel 1
None of these
cancel all
kill 0

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