BE2012安装Remote Agent For Linux提示Cannot /usr/bin/rsh to redhat2

今天在安装BE2012 Remote Agent For Linux时报错如下
Enter the system names separated by spaces on which to install RALUS: (redhat2)
Checking system communication:
Attempting /usr/bin/rsh with redhat2 ....................................................... Cannot /usr/bin/rsh to redhat2
Initial system check failed.
Press [Return] to continue:

以为是rsh服务的问题，后来证实原来是/etc/hosts没有相关的主机名条目redhat2，将redhat2添加到/etc/hosts即可完成安装
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.137  redhat2

继续安装，直到安装完成
Enter the system names separated by spaces on which to install RALUS: (redhat2)
Checking system communication:
Checking OS version on redhat2 ................................................................. Linux 2.6.32-71.el6.x86_64
Checking system support for redhat2 ......................................... Linux 2.6.32-71.el6.x86_64 supported by RALUS
Initial system check completed successfully.
Press [Return] to continue: