Redirecting stdout to a file AND a terminal window

[pmpgrant]

To All:

I'm a newbie to scripting in Linux (although I began coding 100 years
ago in assembler on a 701!).

I want to write a script that will run a monster math executable (maybe
2-3 days wall time) and scroll its stdout to both a file and a terminal
window (either X-windows or Konsole) so I can watch what's going on at
the same time the good stuff is scrolled to a file, all this without
getting tangled up in Tk/Tcl or Perl or "xwidgets" and the like. The
best I can come up with is something like the following (BTW, my OS is
SUSE 10.1 with KDE as the desktop on a big Linux box, and assume I've
already written a debugged script called MyBigNumberCruncher.sh in
bash):

Manually open from the KDE Desktop a Konsole 1 (or an equivalent
X-window) and type:
touch output.out
tail -f output.out

Then go back to the desktop, and manually open a second Konsole (2) and
type
./MyBigNumberCruncher.sh > output.out

(all this in a common directory) and then sit back at watch the numbers
stream by on Konsole 1 a la The Matrix.

Surely, there's a better way! Oh, BTW, I haven't figured out how to
launch from one console window a second on a separate thread (that
is, without having to go back to the KDE desktop) within the same
script. Do I have to set a separate "non-child" PID? (which I don't know how to do).

Life was a lot simpler under APL.

Thanks, -Old Timer

[CodeRoot]

You might want to check into:

man tee

[pmpgrant]

Yeah, I looked into this before while goolgling around...can't find "tee" in my SUSE distro...or anywhere else.

[pmpgrant]

Before making my first post, I had found some examples of "tee" but they used the Korn and C shells. When I "maned" tee on my SUSE distro, it didn't surface, so I assumed it was not part of bash. However, "info" found it and it does work, so thanks. Nonetheless, I do like the idea of a separate window, and someday I'll write an "elegant" X-windows version of touch, tail, etc.