Shell Programming and Scripting

name,age,marks,roll,section
kevin,25,80,456,A
Satch,23,56,789,B
Meena,24,78,H245,C

awk -F"," ' /name/ { for (i=1;i<=NF;i++) if ($i=="name") idx=i} $0 !~ /name/ { print $idx} ' file

 
l=wc -l
l=`echo $l -1 |bc`
for name in `tail -$l $file|awk '{print $1}'|`
do
 tmp=`echo name|grep -Po '^[a-z]+$'`
 if [ "$tmp" = "$name" ]
  echo $name
 fi
done

var="name"
awk -F"," ' /$var/ { for (i=1;i<=NF;i++) if ($i=="$var") idx=i} $0 !~ /$var/ { print $idx} ' filename

awk -F, '$0 ~ ",?" var ",?" {for(i=1;i<=NF;i++) if($i == var) idx=i; next}
{print $idx}' var=name filename

awk -v var="name" -F"," ' /var/ { for (i=1;i<=NF;i++) if ($i==var) idx=i} $0 !~ /var/ { print $idx} ' file