linux - 如何将输出重定向到文件和标准输出(How to redirect output to a file and stdout)

Question

In bash, calling foo would display any output from that command on the stdout.

(在bash中，调用foo将在stdout上显示该命令的所有输出。)

Calling foo > output would redirect any output from that command to the file specified (in this case 'output').

(调用foo > output会将该命令的所有输出重定向到指定的文件（在本例中为“ output”）。)

Is there a way to redirect output to a file and have it display on stdout?

(有没有一种方法可以将输出重定向到文件并在stdout上显示？)

  ask by SCdF translate from so

Answer 1

The command you want is named tee :

(您想要的命令名为tee ：)

foo | tee output.file

For example, if you only care about stdout:

(例如，如果您只关心标准输出：)

ls -a | tee output.file

If you want to include stderr, do:

(如果要包括stderr，请执行以下操作：)

program [arguments...] 2>&1 | tee outfile

2>&1 redirects channel 2 (stderr/standard error) into channel 1 (stdout/standard output), such that both is written as stdout.

(2>&1将通道2（stderr /标准错误）重定向到通道1（stdout /标准输出），以便将两者都写为stdout。)

It is also directed to the given output file as of the tee command.

(从tee命令开始，它也被定向到给定的输出文件。)

Furthermore, if you want to append to the log file, use tee -a as:

(此外，如果要追加到日志文件，请使用tee -a作为：)

program [arguments...] 2>&1 | tee -a outfile