servers=`grep nameserver /etc/resolv.conf | cut -f 2`
for server in $servers
  do
    foctet=`echo $server | cut -f 1 -d .`
    if `test $foctet -lt 127`
       then
          class="A"
          network="$foctet.0.0.0"
    fi
    if `test $foctet -gt 127`
       then
          class="B"
          network="`echo $server | cut -f 1,2 -d .`.0.0"
    fi
    if `test $foctet -gt 191`
       then
          class="C"
          network="`echo $server | cut -f 1,2,3 -d .`.0"
    fi
    echo "The $server is a member of the class $class network $network "
  done

<!----this group script----->
groups=`cut -f 1,3 -d : /etc/group`
for element in $groups
   do
     gname=`echo $element | cut -f 1 -d :`
     gid=`echo $element | cut -f 2 -d :`
     echo "The group $gname has the group identification number of $gid"
   done
<!-----end of group script------>

Purpose:  Output the user Name and ID.
users=`cut -f 1,3 -d : /etc/passwd`
for element in $users
   do
     uname=`echo $element | cut -f 1 -d :`
     uid=`echo $element | cut -f 2 -d :`
     echo "$uname has the user identification number of $uid"
   done