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arthas/tutorials/katacoda/command-tee-cn/tee.md

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类似传统的`tee`命令 用于读取标准输入的数据,并将其内容输出成文件。
tee指令会从标准输入设备读取数据将其内容输出到标准输出设备同时保存成文件。
`tee -h`{{execute T2}}
```bash
USAGE:
tee [-a] [-h] [file]
SUMMARY:
tee command for pipes.
EXAMPLES:
sysprop | tee /path/to/logfile | grep java
sysprop | tee -a /path/to/logfile | grep java
WIKI:
https://arthas.aliyun.com/doc/tee
OPTIONS:
-a, --append Append to file
-h, --help this help
<file> File path
```
## 命令示范
### 将sysprop命令执行结果另外存储在`/tmp/logfile`中
`sysprop | tee /tmp/logfile`{{execute T2}}
查看`/tmp/logfile`文件:
`cat /tmp/logfile`{{execute T2}}
### 将sysprop命令执行结果匹配`java`后另外追加在`/tmp/logfile`中
`sysprop | grep java | tee -a /path/to/logfile`{{execute T2}}
查看`/tmp/logfile`文件:
`cat /tmp/logfile`{{execute T2}}