redirecting output to multiple outputs

granny · 02-12-2004, 12:17 PM

I want to redirect output to multiple places, how can this be done. Something simple as...

ls /etc redirected to both a file and monitor. I know how to redirect to a file and understand std output is monitor, but how do I do both in 1 command?

ls /etc > file and then???

Oliv' · 02-12-2004, 01:01 PM

Code:

ls /etc/ 2>&1 | tee file

Hope this help you

granny · 02-12-2004, 01:04 PM

sweet, thanks oliv, worked perfectly. What did the 2>&1 do though

Oliv' · 02-12-2004, 01:11 PM

If my memory is good: 2>&1 is used to duplicate stderr to stdout

granny · 02-12-2004, 02:56 PM

that's what I though, but ls /etc isn't an err so why does it work. Wouldn't it just produce stnd out? Either way thanks Oliv!

Oliv' · 02-13-2004, 07:27 AM

It works because stdout remains stdout... You just add messages from stderr to stdout.
It's just a precaution if you process commands which can cause errors

hiteshmaisheri · 02-13-2004, 08:18 AM

the 2>&1 means that both stdout and sterr to the pipe and then to the tee command and to the file