tee

Created by : Mr Dk.

2023 / 04 / 11 11:19

Hangzhou, Zhejiang, China

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Background

tee 能够从标准输入中读取数据，然后写出到标准输出以及一个或多个文件中。相当于一个一对多的 adapter。

Usage

$ tee --help
Usage: tee [OPTION]... [FILE]...
Copy standard input to each FILE, and also to standard output.

  -a, --append              append to the given FILEs, do not overwrite
  -i, --ignore-interrupts   ignore interrupt signals
      --help     display this help and exit
      --version  output version information and exit

If a FILE is -, copy again to standard output.

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
For complete documentation, run: info coreutils 'tee invocation'

ChatGPT 给出的资料：

In Linux, the "tee" command is used to read from standard input and write to both standard output and one or more files. It allows the user to redirect the output of a command to both the screen and a file simultaneously. The syntax for using tee is as follows:

command | tee filename

This will run the "command" and print its output to the screen, while also writing it to the file specified by "filename".

Demo

-a 参数用于追加写入文件，而不是从头开始写入文件。

$ echo "Hello" | tee test.txt
Hello

$ cat test.txt
Hello

$ echo "Hello" | tee -a test.txt
Hello

$ cat test.txt
Hello
Hello

References

tee(1) — Linux manual page

tee command in Linux with examples - GeeksforGeeks