1.master和media都是用的同一个安装包，安装前做好备份

2.安装过程中才会提示这台服务器是否为master，然后如果选n，再输入master的名称
而不是一开始就询问。。。掉坑了，删掉再装了一遍
Is client the master server? [y,n] (y) n

3.如果安装后master无法识别，重启master服务尝试能否识别

If this machine will be using a different network interface than the
default (logdb1), the name of the preferred interface should be used
as the configured server name. If this machine will be part of a
cluster, the virtual name should be used as the configured server name.

Would you like to use "beifen" as the configured
NetBackup server name of this machine? [y,n] (y) client

Would you like to use "beifen" as the configured
NetBackup server name of this machine? [y,n] (y) n

Enter the name of this NetBackup server: client

Is client the master server? [y,n] (y) n

What is the fully qualified name of the master server? master

Checking network connections.

TELEMETRY_UPLOAD value NO saved.

Sending SIGHUP to xinetd process.

Enter the Enterprise Media Manager server (default: master):