unix - Replacing alternate spaces with newline? -


i trying replace alternate spaces newlines using unix. tried using tr command in unix unable modify replace alternate spaces.

sample input:
0 1 2 3 4 5
sample output:
0 1
2 3
4 5

how achieve ?

awk might in case:

echo "0 1 2 3 4 5" | awk ' {     (i=1; i<=nf; i++)     {         if ((i-1)%2 == 0)         {             printf "%d ",$i;         }         else         {             print $i         }     } } '

we split space , have 6 items. we, then, looping through fields , outputting each field. every other field output in new line print $i; otherwise print using printf "%d ",$i; , not create new line.


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