Shell Programming and Scripting

I Have Two Files, A And B. How Can I Rewrite Them Into A New File With The Following Pattern?

File A
123
456
789

File B
235
478
987

Become

123 235
456 478
987 789

Thanks In Advance!!

Could you please confirm your output:

Code:

123 235
456 478
987 789

'man paste'

I believe that should be a typo

here is a try with awk,

Code:

awk 'BEGIN{ while ( (getline < "b" ) > 0 ) { arr[i++] = $0; } i=0; } { printf "%d %d\n", $0, arr[i++] }' a

Matrix,
If it is typo, a simple 'paste' will do it:

Code:

paste A B

you are right,
I just wanted to give an alternate solution for that.

sorry about the typo mistake...
this time...I would like to concanate the contents of file B with contents of file A, then for the resulted output, I would like overwrite it into file A, as shown below. I tried to usen cat File A File B >> File A commands, but it seems that I cannot rewrite File A.
What other commands that I should use?


123
456
789

235
478
987