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Please post such questions under Shell Scripting Forum. You will receive faster and may be better replies.

Hope this is what you are looking for
cgi@tioman> (/home/cgi) $ awk '{if(NR==1){print}else{for(i=1;i<=NF;i++){ printf "%s\t",$i ;if($i==0){printf "\n"; next} }}}' test.txt

Bh1 Bh2 Bh3 Bh4...

awk 'NR == FNR {
f[$1]
next
}
$1 in f
' version1 version2

try this..


awk ' { for(i=1; i<=NR; i++) print $i }' filename