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Unix

Unix
Which command is used to display a file contents in octal form?

oct
of
cd
od

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Unix
Which of the following keys is used to replace a single character with new text?

R
r
S
s

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Unix
Which commands is used to assign executable permission to all of the files named "letter"?

chmod ugo+x letter
chmod ugo+rw letter
chmod u+x letter
chmod ugo+r letter

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Unix
Which of the following command is used to count just the number of lines contained in a file?

wc -l
wc -w
None of these
wc -c
wc -r

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

r
d
w
s

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Unix
Which command is used with vi editor to save file and remain in the editing mode?

:q
q!
:x
:w
None of these

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