Backup script for Linux using tar and find

script.sh
#!/bin/bash
#
# creates backups of essential files
#
DATA="/home /root /usr/local/httpd"
CONFIG="/etc /var/lib /var/named"
LIST="/tmp/backlist_$$.txt"
#
#mount /mnt/backup
set $(date)
#
if test "$1" = "Tue" ; then
# weekly a full backup of all data and config. settings:
#
tar cfz "/mnt/backup/data/data_full_$6-$2-$3.tgz" $DATA
rm -f /mnt/backup/data/data_diff*
#
tar cfz "/mnt/backup/config/config_full_$6-$2-$3.tgz" $CONFIG
rm -f /mnt/backup/config/config_diff*
else
# incremental backup:
#
find $DATA -depth -type f \( -ctime -1 -o -mtime -1 \) -print > $LIST
tar cfzT "/mnt/backup/data/data_diff_$6-$2-$3.tgz" "$LIST"
rm -f "$LIST"
#
find $CONFIG -depth -type f \( -ctime -1 -o -mtime -1 \) -print > $LIST
tar cfzT "/mnt/backup/config/config_diff_$6-$2-$3.tgz" "$LIST"
rm -f "$LIST"
fi