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

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

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Unix
The [line number G] key allows you

to move cursor left by one position
to move cursor right by one position
to move cursor to the beginning of the line specified by the number
None of these
to move cursor down by one line

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