根据资料上说，mysqlbackup备份数据库的语法如下：
mysqlbackup -u<user> -p<password>
--backup_dir=<backup-dir>
backup-and-apply-log
具体我执行的时候，老是报错：
[root@sztech1 ~]# mysqlbackup -u root -p --backup_dir=/backup backup-and-apply-log
MySQL Enterprise Backup version 3.11.0 Linux-3.8.13-16.2.1.el6uek.x86_64-x86_64 [2014/08/26]
Copyright (c) 2003, 2014, Oracle and/or its affiliates. All Rights Reserved.
mysqlbackup: INFO: Starting with following command line ...
mysqlbackup -u root -p --backup_dir=/backup backup-and-apply-log
mysqlbackup: INFO:
Enter password:
141206 01:55:16 mysqlbackup: WARNING: Can not establish connection to mysql server.
Connection open fails with error "Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)"
mysqlbackup: ERROR: Connection initialization error.
mysqlbackup failed with errors!
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