Shell Programming and Scripting

while read linea
     do


       largo=${#linea}
       echo "largo es///////////: $largo "


      if [ $largo -ne 171 ]
       then
         echo "Longitud De Registro Invalida"
         echo " $linea > ERROR DE LONGITUD"  >>  $PATH_DAT/$ArchSalida
       fi
     done <  ${PATH_DAT}/$ArchPro #while read linea

if [ $largo -ne 171 ]
       then
         echo "Longitud De Registro Invalida"
         echo " $linea > ERROR DE LONGITUD"  >>  $PATH_DAT/$ArchSalida
       fi

expr "${linea}" : '\(..\)'

${linea:0:2}

${variable:offset:length}