Nagios的错误及解决方法：1、CHECK_NRPE: Error - Could not complete SSL handshake.在监控端10.11：# telnet 10.100.0.18 5666Connection closed by foreign host.出现此错误，证明监控端不能与被监控端的nrpe联系，10.100.0.18:# netstat –tnlp |grep 5666tcp 0 0 10.100.0.18:5666 0.0.0.0:* LISTEN 18384/nrpe手动重启nrpe服务：kill 18384# rm –rf /var/run/nrpe.pid 特别注意要删除其pid文件# /usr/local/nagios/bin/nrpe –c /usr/local/nagios/etc/nrpe.cfg –d重新测试：# telnet 10.100.0.18 5666Trying 10.100.0.18...Connected to 10.100.0.18.Escape character is '^]'.此时就可以了。2、UNKNOWN: iostat not found or is not executable by the nagios user.Check_cpu.sh 插件出现此错误，有两种情况：（1） 没有安装iostat# yum install –y sysstat（2） Nagios 用户没有权限，也就是此脚本的属主属组不是nagios

# chown nagios.nagios check_cpu.sh