mysql innobackupex 的一则错误该怎么解决

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-bash-3.2$ ./innobackupex --version-check /usr/mysql/xtraback/xtrabackup03
InnoDB Backup Utility v1.5.1-xtrabackup; 
150930 17:16:26  innobackupex: Executing a version check against the server...
150930 17:16:26  innobackupex: Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_group=xtrabackup' (using password: NO).
innobackupex: got a fatal error with the following stacktrace: at ./innobackupex line 3006
        main::mysql_connect('abort_on_error', 1) called at ./innobackupex line 1551
innobackupex: Error: Failed to connect to MySQL server as DBD::mysql module is not installed at ./innobackupex line 3006.
150930 17:16:26  innobackupex: Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_group=xtrabackup' (using password: NO).
innobackupex: got a fatal error with the following stacktrace: at ./innobackupex line 3006
        main::mysql_connect('abort_on_error', 1) called at ./innobackupex line 1570
innobackupex: Error: Failed to connect to MySQL server as DBD::mysql module is not installed at ./innobackupex line 3006.

报这样一个错误。这个错误原因是innobackupex是用perl语言写的，perl要通过perl DBI模块和DBD-mysql模块调用mysql数据库来执行。
所以，需要安装包perl-DBD-MySQL。安装这个包，会遇到错误：
yum install perl-DBD-MySQL。采用这个命令安装会出现如下错误：
Transaction Check Error:
  file /etc/my.cnf from install of mysql-5.0.77-4.el5_5.4.i386 conflicts with file from package MySQL-server-5.6.25-1.linux_glibc2.5.i386
原因是：perl-DBD-MySQL对应了5.0版本的mysql，而你安装的5.6的版本mysql。解决办法是手动安装DBD。

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