IFS

#!/bin/bash

#IFS.sh

line="root:x:0:0:root:/root:/bin/bash"

oldIFS=$IFS;

IFS=":"

count=0

for item in $line;

do

    [ $count -eq 0 ] && user=$item;

    [ $count -eq 6 ] && shell=$item;

    let count++

done;

IFS=$oldIFS

echo $user\'s shell is $shell