concatenate values from two text files

VijayB · 07-15-2014, 10:53 AM

Hi,

I have two text files & i want to concatenate the first line of 1st text file with 1st line of second text file and second line of first text file with second line of second text file.

Can anyone please let me know .. how do i do that.

BR\\Vijay

urbanwks · 07-15-2014, 11:08 AM

Quote:

Originally Posted by VijayB

Hi,

I have two text files & i want to concatenate the first line of 1st text file with 1st line of second text file and second line of first text file with second line of second text file.

Can anyone please let me know .. how do i do that.

BR\\Vijay

there are several options here: http://unix.stackexchange.com/questi...s-of-two-files

eklavya · 07-16-2014, 12:52 AM

Run the Script

Code:

#!/bin/bash
i=1
while :
do
tail -n +$i first.txt | head -n 1 >> output.txt
tail -n +$i second.txt | head -n 1 >> output.txt
var=$(echo `wc -l < first.txt` + `wc -l < second.txt` | bc)
if [ $var -eq `wc -l < output.txt` ]
then
break
fi
i=`expr $i + 1`
done

fortran · 07-16-2014, 04:34 AM

I think, we do not need to run large code script. If both files have equal number of lines, it can be done in single line.

Code:

awk 'BEGIN { OFS="\n"} FNR==NR { a[(FNR"")] = $0; next } { print a[(FNR"")], $0 }' first_file.txt second_file.txt