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The information of the two files should be redirect to
Third file in such a way that, the third file contain the
information like this.

1st line in third file should be from 1st file
2nd line in Third file should be from 2nd file
3rd line in Third file should be from 1st file
4th line in Third file should be from 2nd file
-
- so on

Answer Posted / amol

Unix utility sed can be used serve the purpose
Assuming file1.txt and file2.txt are two input files and
file3.txt is the third file.

Contents of the file1.txt
line 1
line 2
line 3

Contents of the file2.txt
LINE 1
LINE 2
LINE 3


After executing below mentioned command

sed -n -e '{
> R file2.txt
> p
> }' file1.txt > file3.txt


The third file file3.txt will be
line 1
LINE 1
line 2
LINE 2
line 3
LINE 3

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