Linux tee命令详解

tee 的功能是从标准输入读取，再写入标准输出和文件。

用法：tee [OPTION]... [FILE]...

-a, --append 追加到文件

-i, --ignore-interrupts 忽略中断信号

-p 诊断写入非管道的错误

--output-error[=MODE] 设置输出错误的方式，MODE 的选项在下边

--help 帮助文档

--version 版本信息

MODE:

warn 写入遇到错误时诊断

warn-nopipe 写入非管道遇到错误时诊断

exit 写入遇到错误时退出

exit-nopipe 写入非管道遇到错误时退出

如果没有指定 --output-error，tee 会在写入管道发生错误时立即退出，写入非管道时诊断。

使用示例：

默认功能和追加功能：

[root@server dir]# echo 'This is a sentence.' | tee output
This is a sentence.

[root@server dir]# cat output
This is a sentence.

[root@server dir]# echo 'This is another sentence.' | tee -a output
This is another sentence.

[root@server dir]# cat output
This is a sentence.
This is another sentence.

[root@server dir]# echo 'This is a unique sentence.' | tee output
This is a unique sentence.

[root@server dir]# cat output
This is a unique sentence.

同时写入两个文件：

[root@server dir]# tee a b
they have the same content
they have the same content
^C
[root@server dir]# cat a
they have the same content
[root@server dir]# cat b
they have the same content