> For the complete documentation index, see [llms.txt](https://kawsing.gitbook.io/opensystem/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kawsing.gitbook.io/opensystem/andoid-shou-ji/untitled-4/untitled-2.md).

# 讓Cron的工作不寄信

讓Cron的工作不寄信

*\*/5*   \* /sbin/ntpdate 172.16.10.9 這樣每5分鐘會寄信，若要此工作不寄信，改用下面的命令 

```
*/5 * * * * /sbin/ntpdate 172.16.10.9 > /dev/null 2>&1
```