DOS - How to echo to both the console and a file

Using DOS alone, you can't.

You will need to use Tee, a utility designed to solve this exact problem.

Console

File

dir

Yes

Output to: Console only

dir > file.txt

Yes

Output to: File only

dir | tee file.txt

Yes

Output to: Console & File

dir 2>&1 | tee file.txt

Yes

Output to: Console & File, including standard error

Tee will write to the console and the filename passed as a parameter.

Think of a highway T-junction or a plumber's T-splitter. A T has 1 input and 2 outputs.

tee --help
Usage: tee [OPTIONS] [FILE]
Copy standard input to standard output and FILE.

Where can I find tee for Windows ?