UNIX for Dummies Questions & Answers

a.txt
1
2
3
4

b.txt
a
b
c
d
e

c.txt
1
a
2
b
3
c
4
d
e

i=1
for k in `cat B.txt`
do
sed -n "$i p" B.txt >> mrg_fil
sed -n "$i p" C.txt >>mrg_fil
i=`expr $i + 1`
done

awk '{getline s < "b.txt"; print; print s}' a.txt

echo a  | awk 'BEGIN { while ( getline < "a" ) { arr[i++] = $0 }; while ( getline < "b" ) { arr1[j++] = $0 } } { for ( a=0; a<=i; a++) { if ( arr[a] ) { printf "%s\n", arr[a] } if ( arr1[a] ) { printf "%s\n", arr1[a] } } }'

paste -d '\n' [ab].txt

1
a
2
b
3
c
4
d

e