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Topic: How to use Cron ?, How to use Cron ?

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manishsadh Offline

Group: Members
Posts: 42
Joined: Jan. 2007

Posted: April 03 2007,14:23

Hi Folks,

my system - dsl 3.2 frugal

need some help with running cron.
i edited the /etc/crontab file and
added the following

0 10 * * * * /home/dsl/xx.sh

then i ran the MyCron from system -> control panel.
at 10 am the scheduled script didnt run.

what i am i missing ? is there a specific cron howto for dsl ?

thanks.

robc

Group: Members
Posts: 24
Joined: Jan. 2007

Posted: April 04 2007,16:47

manishsadh, you can have cron output to a file, including errors, to view. To do this use the following line in your crontab:

Code Sample

0 10 * * * * /home/dsl/xx.sh >> /path/to/output/file 2>&1

I am having trouble with cron also. It runs, but will not open gui applications. When I use the following line in the crontab:

Code Sample

* * * * * * beaver & >> /tmp/crontest 2>&1

The application does not open and I get this in nohup.out:

Quote

Gtk-WARNING **: cannot open display:

I get similar results for all gui applications that I try to open with cron. All the applications do run when I use Aterm or click on an icon.

Though they will run if I use the following line in crontab instead:

Code Sample

* * * * * * xterm -e beaver & >> /tmp/crontest 2>&1

but then I have an extra xterm window open that I don't want.

I'm not sure if this is a problem with gtk or with cron.

I also tryed using cron to start a script that would call a gui program and I got the same results. the script would run, but the application I wanted to start did not.

Does anyone know of a fix for this or have any guidance for this situation?

Thanks
Rob

jimmit

Group: Members
Posts: 3
Joined: Feb. 2007

Posted: April 11 2007,22:12

I was having the same problem.

I had a shell script that used xset to turn the screen off. I had to launch the script with /bin/bash instead of sh and I had to add "export DISPLAY=:0" to the beginning of my shell script.

In your case you may want to create a script such as this...

Code Sample

#!bin/bash
export DISPLAY=:0
beaver &

I hope that helps!
-James