tee [OPTION]... [FILE]...
+-----------+ tee +------------+
| | -------- | |
| ps -ax | -------- | grep 'foo' |
| | || | |
+-----------+ || +------------+
||
+---------------+
| |
| processes.txt |
| |
+---------------+
Options
-a, --append Append to the given FILEs. Do not overwrite.
-i, --ignore-interrupts Ignore interrupt signals.
--help Display a help message, and exit.
--version Display version information, and exit.
输出到stdout同时，覆盖写入文件
df -h | tee disk_usage.txt
只写入文件，不输出到stdout
command | tee file.out >/dev/null
sudo 模式将信息追加到指定文件，同时stdout显示
echo "newline" | sudo tee -a /etc/file.conf
重定向同时，写入文件
grep 'root' /etc/passwd | tee /tmp/passwd.tmp | wc -l
同时覆盖写入多个文件
command | tee file1.out file2.out file3.out
追加模式写入
command | tee -a file.out
写入内容忽略中断信号ctrl+c
command | tee -i file.out
vim sudo写入
:w !sudo tee %
You can add this to your .vimrc to make this trick easy-to-use: just type :w!!.
" Allow saving of files as sudo when I forgot to start vim using sudo.
cmap w!! w !sudo tee > /dev/null %
The > /dev/null part explicitly throws away the standard output, since, as I said, we don't need to pass anything to another piped command.