Sometimes when Oracle MySQL is already installed and you want to install percona xtrabackup after you can have the following conflict

yum install percona-xtrabackup

Transaction check error:
  file /etc/my.cnf from install of Percona-Server-shared-56-5.6.30-rel76.3.el7.x86_64 conflicts with file from package mysql-community-server-5.7.13-1.el7.x86_64

 

Below 3 steps will help you to resolve the issue :

1) Download mysql-community-libs-compat from mysql

sudo yum localinstall https://dev.mysql.com/get/mysql-community-libs-compat-5.7.26-1.el7.x86_64.rpm

2) Install perl-DBD-MySQL

yum install perl-DBD-MySQL

3) Install percona-xtrabackup

yum install percona-xtrabackup-24