Sum of all rows of all columns - Bash

Question

I have a file like this

1 4 7 ...
2 5 8
3 6 9 

And I would like to have as output

6 15 24 ...

That is the

Answer 1

Your answer is correct. It is just missed to print "sum". Try this:

awk '{sum+=$1;} END{print sum;}' infile > outfile