下面我测试的环境为Ubuntu 16.04.1 LTS ，安装Percona XtraBackup 2.4为例：
1：从Percona官方网址获取repository packages:
mylnx02@mylnx02:~$ wget https://repo.percona.com/apt/percona-release_0.1-4.$(lsb_release -sc)_all.deb
--2017-02-28 11:57:52-- https://repo.percona.com/apt/percona-release_0.1-4.xenial_all.deb
Resolving repo.percona.com (repo.percona.com)... 74.121.199.234
Connecting to repo.percona.com (repo.percona.com)|74.121.199.234|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 6394 (6.2K) [application/octet-stream]
Saving to: ‘percona-release_0.1-4.xenial_all.deb’