做HA实验时，启动heartbeat出现错误：

   ERROR: Client child command [/usr/lib/heartbeat/ipfail] is not executable

   ERROR: Heartbeat not started: configuration error.

   ERROR: Configuration error, heartbeat not started.

因为是64位的，ha.cf 配置文件里

/usr/lib/heartbeat/ipfail 这一句要改为：

/usr/lib64/heartbeat/ipfail

再次启动/etc/init.d/heartbeat start

Starting High-Availability services: INFO:  Resource is stopped

Done.

成功