How to add a column from a file to another file

Question

I have a file with two columns as

1 1 2 3 3 4 

and a file with one column as

6 7 9 

I would like to add the second file in the first one. The output should be:

1 1 6 2 3 7 3 4 9 

Answer 1

$ pr -mts' ' file1 file2 1 1 6 2 3 7 3 4 9  $ paste -d' ' file1 file2 1 1 6 2 3 7 3 4 9 

Answer 2

awk 'NR==FNR{a[NR]=$0;next}{print a[FNR],$0}' file1 file2 

Note: Will work with files of same length. If file lengths' are different, go with sudo_O's solution.

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Just for the heck of it, here is an awk command that I think should simulate paste. Purely for fun though, if I were you I would still go with sudo_O's solution (or may be not!)

awk 'NR==FNR{a[++y]=$0;next}{b[++x]=$0} END{z=x>y?x:y;while(++i<=z){print a[i],b[i]}}' file1 file2