tee [OPTION]... [FILE]...
!subtitle:功能
读取标准输入，然后将内容打印到标准输出以及每个文件。
!subtitle:类型
可执行文件（/usr/bin/tee），属于 coreutils。
!subtitle:参数
OPTION 选项：
-a, --append - 追加写入文件，而不是覆盖文件
-i, --ignore-interrupts - 忽略中断信号
-p - 以更合适的模式操作管道
--output-error[=MODE] - 写入错误时的行为：
warn - 写入错误时发出警告
warn-nopipe - 写入非管道输出发生错误时，发出警告
exit - 写入错误时退出
exit-nopipe - 写入非管道输出发生错误时，退出
--help - 显示帮助
--version - 显示版本
FILE - 文件列表；如果没有这个参数或指定为 -，则读取标准输入
!subtitle:创建文件
$ tee 1.txt << EOF # 将接下来的输入写入 1.txt，遇到 EOF 时结束
> Primers 编程伙伴
> https://xplanc.org/primers/
> EOF
Primers 编程伙伴
https://xplanc.org/primers/
$ cat 1.txt
Primers 编程伙伴
https://xplanc.org/primers/
cmd << XXX语法表示读取输入直到XXX结束，然后将这段内容（不含XXX）作为标准输入运行cmd。
!subtitle:重定向
$ my_cmd | tee -a 1.txt # 将 my_cmd 命令的输出打印出来的同时追加写入 1.txt
TEE(1) User Commands TEE(1)
NAME
tee - read from standard input and write to standard output and files
SYNOPSIS
tee [OPTION]... [FILE]...
DESCRIPTION
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
-p operate in a more appropriate MODE with pipes.
--output-error[=MODE]
set behavior on write error. See MODE below
--help display this help and exit
--version
output version information and exit
MODE determines behavior with write errors on the outputs:
warn diagnose errors writing to any output
warn-nopipe
diagnose errors writing to any output not a pipe
exit exit on error writing to any output
exit-nopipe
exit on error writing to any output not a pipe
The default MODE for the -p option is 'warn-nopipe'. With "nopipe"
MODEs, exit immediately if all outputs become broken pipes. The de‐
fault operation when --output-error is not specified, is to exit imme‐
diately on error writing to a pipe, and diagnose errors writing to non
pipe outputs.
AUTHOR
Written by Mike Parker, Richard M. Stallman, and David MacKenzie.
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
COPYRIGHT
Copyright © 2023 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/tee>
or available locally via: info '(coreutils) tee invocation'
GNU coreutils 9.4 April 2024 TEE(1)