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ftptop
===
proftpd服务器的连接状态
## 说明
**ftptop命令** 类似于top命令的显示风格显示proftpd服务器的连接状态。
### 语法
```
ftptop(选项)
-D：过滤正在下载的会话；
-S：仅显示指定虚拟主机的连接状态；
-d：指定屏幕刷新时间，默认
