Unmet dependencies. Try 'apt-get -f install' with no packages

在ubuntu14.04上用sudo apt-get install percona-xtrabackup安装xtrabackup时提示

zhj@my-SERVER:~$ sudo apt-get install percona-xtrabackup

[sudo] password for zhj:
Reading package lists... Done

Building dependency tree

Reading state information... Done

You might want to run 'apt-get -f install' to correct these:

The following packages have unmet dependencies:
percona-xtrabackup : Depends: libdbd-mysql-perl but it is not going to be insta lled

E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a s olution).

当我输入sudo apt-get -f install percona-xtrabackup时提示相同的错误

解决方法是行执行sudo dpkg --purge percona-xtrabackup，再执行sudo apt-get -f install percona-xtrabackup