自定义Nagios NRPE脚本EXIT退出值和nagios状态都应关系：
| 状态 | EXIT退出值 | 输出 | 例子 |
| OK | 0 | echo "OK - it‘s ok." | echo "OK - it‘s ok." exit 0 |
| WARNING | 1 | echo "WARNING - it‘s warning." | echo "WARNING - it‘s warning." exit 1 |
| CRITICAL | 2 | echo "CRITICAL - it‘s critical." | echo "CRITICAL - it‘s critical." exit 2 |
| UNKNOWN | 3 | echo "UNKNOWN - it‘s unknown." | echo "UNKNOWN - it‘s unknown." exit 3 |
错误的例子：
shell脚本中echo和退出值：
echo "OK - it‘s ok."
exit 1
此时，Nagios会显示：
这条服务对应的状态是”WARNING“，但是输出的信息是”OK - it‘s ok."