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tty
===
显示连接到当前标准输入的终端设备文件名。
## 补充说明
**tty命令** 可以显示连接到当前标准输入的终端设备文件名。
### 语法
```
tty [选项]
### 选项
-s 什么也不显示，只返回退出状态值
### 例子
```bash
[root@localhost ~]# tty
/dev/pts/0
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