Shell Programming and Scripting

$ cat tst.cfg
AA BC FG
RF TT GH NL
DD FF HH

$ cat mtst
#!/bin/bash
while read a
do set -- $a
i=0
while [ $i -lt $# ]
do let i=i+1
eval echo -n var$i=\$$i'\ '
done
echo
done <tst.cfg

$ sh mtst
var1=AA var2=BC var3=FG
var1=RF var2=TT var3=GH var4=NL
var1=DD var2=FF var3=HH
$

while read var1 var2 var3 extra
do
   echo "\$var1=$var1"
   echo "\$var2=$var2"
   echo "\$var3=$var3"
   if [ ! -z "$extra" ]
   then
      echo "I have extra fields \"$extra\""
   fi
done < input_file

while read -a line; do for i in ${line[@]}; do echo -n "var$x:$i "; ((x++)); done; echo "";x=1;done < file

while read -a VARR; do for i in ${!VARR[@]}; do echo -n "var$i:${VARR[$i]} "; done; echo;  done < file3
var0:AA var1:FG var2:TH 
var0:AD var1:FR var2:HK var3:LO 
var0:AX var1:DF var2:ER var3:TR 
var0:AZ var1:SD var2:WE