Re: shell command or script to combine two files

[Jomat <jomat@copete.de>]

Quoting Dino Vliet <dino_vliet@yahoo.com>:

> Hi debian people,
> I have two files with the same number of rows but different columns.  
> I want to create one file out of them and am looking for a simple  
> shell command or shell script to accomplish that.
> File 1 has N number of rows and columns X,Y,Z and File 2 has N  
> number of rows and P,Q,R as columns.The resulting file should have N  
> number of rows and X,Y,Z,P,Q,R as columns.
> 1) Is there a simple command in Bash to accomplish this?2) What  
> would a script to do this look like? Uses Gawk?3) If N=10000000 and  
> the two files have 45 columns with mixed integer and character  
> values, what would be the most efficient approach (fastest) and why?
> Thanks in advanced&nbsp;

Use paste. Like this:
paste -d\   filea fileb >filec

-d is the delimiter, in this case a space, per default a tab.

Example:
% cat filea
1 2 3
a b c
x y z
o p q

% cat fileb
6 7 8
5 6 7
q w e
a s d

% paste -d" " filea fileb
1 2 3 6 7 8
a b c 5 6 7
x y z q w e
o p q a s d