一、重启nagios 报错：
Starting nagios:This account is currently not available. #这个账户目前不可用；
解决方法：
a、编辑/etc/passwd
把 nagios:x:501:501::/home/nagios:/sbin/nologin 修改为：
nagios:x:501:501::/home/nagios:/bin/bash
b、重启nagios
二、nagios 监控出现It appears as though you do not have permission
监控页面出现
It appears as though you do not have permission to view information for any of the hosts you requested...
If you believe this is an error, check the HTTP server authentication requirements for accessing this CGI and check the authorization options in your CGI configuration file.
解决方法：
a、修改/usr/local/nagios/etc/cgi.cfg
use_authentication=1 #把1修改为0
b、重启nagios