Backup script for Linux using tar and find

Goal

Choice of hardware

Script

• it mounts my backupdrive
• it checks the date
• every sunday it makes a full backup of some datafiles and some configuration settings, older incremental backups are removed. other days it backups files that have been accessed the last day
• it dumps all the contents of a mysql database to the backup drive and zips the file
• it unmounts the backup drive

1 3 * * * /root/scripts/daily_backup

Code

#!/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" = "Sun" ; 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
#
# create sql dump of databases:
mysqldump -u root --password=mypass --opt mydb > "/mnt/backup/database/mydb_$6-$2-$3.sql"
gzip "/mnt/backup/database/mydb_$6-$2-$3.sql"
#
umount /mnt/backup

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