最近我们的一台服务器出现故障，无法启动服务。我查看了一下/var/log/messages，发现了以下情况：
Dec 27 00:53:48 localhost apcupsd[3413]: apcupsd FATAL ERROR in linux-usb.c at line 609 Cannot find UPS device -- For a link to detailed USB trouble shooting information, please see <http://www.apcupsd.com/suppo$
Dec 27 00:53:48 localhost apcupsd[3413]: apcupsd error shutdown completed
Dec 27 00:53:59 localhost kernel: Linux video capture interface: v2.00
Dec 27 00:53:59 localhost kernel: bttv: driver version 0.9.16 loaded
Dec 27 00:53:59 localhost kernel: bttv: using 8 buffers with 2080k (520 pages) each for capture
Dec 27 00:56:13 localhost ntpd[3397]: ntpd exiting on signal 15
Dec 27 00:56:13 localhost rpc.statd[3255]: Caught signal 15, un-registering and exiting.
Dec 27 00:56:14 localhost kernel: Kernel logging (proc) stopped.
Dec 27 00:56:14 localhost kernel: Kernel log daemon terminating.
Dec 27 00:56:15 localhost exiting on signal 15
首先，我检查了其他服务器上的日志，发现那里也出现了关于 apcpusd 的前两个错误，但之后就没有任何错误了。服务器正在CentOS 5.11运行Netavis Observer 4.3