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

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Linux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