Etudiante demmande interpretation script

SPOL=/home/jhone/spool
>$SPOL/file_cmd
while read rang
do
sqlplus -S << FIN >>$SPOL/file_cmd
FIN
done <$1
nb=0
suite_file="$(date +%y%m%d)_$(date +%H%M%S)"
liste="01 02 "
for i in $liste
do
grep "m=$i" $SPOL/file_cmd>Create_tt"$i"_$suite_file
done
>$SPOL/file_cmd
echo "\n"
tar cf Create_tt*$suite_file.tar Create_tt*$suite_file.gz
(uuencode Create_tt*$suite_file.tar Create_tt_$suite_file.tar) | mailx -s "Fichiers de creation tt du $suite_file" jhone@free.com
rm Create_tt*$suite_file.gz Create_tt*$suite_file.tar