UNIX for Dummies Questions & Answers

Hi, I have lost a lot of hours by looking for answer but without results.. My problem is that:
I use Debian GNU/Linux and I want to configure cron in order to run rtorrent every day between 24.00 and 09.00. That part I have achieved, but I couldn't forced cron to make it visible on any of my terminals... How should I do that?! I have typed in by "crontab -e":

Code:

"TERM = linux
0 0 * * * /usr/bin/rtorrent my_torrent_files
0 9 * * * pkill rtorrent"

I also have tried:

Code:

"TERM = linux
0 0 * * * tset vt100 && /usr/bin/rtorrent my_torrent_files
0 9 * * * pkill rtorrent"

I'm realy worn out by this single nuisance - I have been configuring my debian box for two days from basic text installation and that part is taking the most of it :/ So, if You could be so kind I would really appreciate that, thanks in advance!

Put it in script then setup cron with that script.
Script can be run every hour from 24 to 9.

When it starts it will run rtorrent in 24
Then when it runs in 9, it will kill the pid of that rtorrent.

A simple example :

Code:

HOUR=$(date "+%H")
case $HOUR in
24)
/usr/bin/rtorrent my_torrent_files &
RT=$!
;;
09)
## feel free to check the pid before with ps.
kill $RT
;;
esac

Yep, it works pretty well, but still it doesn't puts its output onto whichever /dev/tty*. Maybe there is some kind a command which invokes terminal and can get a program as an argument and show its result in that particular tty. I have tried to redirect its output into tty but to no avail:
"rtorrent >> /dev/tty*"
and
"/dev/tty* < rtorrent"

Use screen in that case.

Since i haven't use it in such manner, will need time to examine a bit.
Regards
Peasant.

There is no terminal context in cron. It is a background process scheduler.

Unless output from a cron job is redirected to a file (or /dev/null) it will by default appear in a unix local mail for the user of the cron.

@Peasant
The value of "date +%H" is range 00-23 . It is never 24.
Also, your script will start many copies of "torrent".


@juru_piotr
I hope that the double quote characters in your post are not actually in your crontab file.

Not it will not start many copies since it will be run one time every hour from cron.
Since it won't ever match 00) more then once, that should't happen.

The 24 is my miss and i apologize for that it should be 00.

Regards
Peasant.

I am aware of that, but that I want to achieve is to force it to do so, either by hook or by crook, for example redirecting this particular program's output to some kind a terminal or (in)directly to my tty*. I think that the whole unix idea is about building magnificent monuments from the tiny blocks P.S. I assure You, I do not have those both quotes in my crontab - those are just my approaches :P