[MySQL] Added backup script

Linux/mysql_backup.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# config section
+date=`date +%Y-%m-%d`
+backup_dir='/mnt/mysql_backup'
+retention=3
+
+# create backup
+mkdir -p $backup_dir
+
+# database backup
+for DB in $(mysql -e 'show databases' -s --skip-column-names|grep -v 'information_schema\|performance_schema'); do
+  mysqldump $DB > "$backup_dir/$date.$DB.sql";
+done
+
+# delete old backups
+find $backup_dir -type f -mtime +$retention -name '*.sql' -execdir rm -- '{}' \;