Raspberry Pi Forums

Hiya I'm hoping you can help a noob out.

I'm trying to run a cron job that will run a slideshow with Qiv. The cron job will stop and start qiv every night to run with the latest pictures added to the folder. Here is the text of my crontab:

59 1 * * * kill all qiv
* 2 * * * sudo qiv -fs /home/pi/Desktop/slideshow/*.jpg -m -t -d 5 -i

I've ran the commands at the command prompt and they work just fine. But for some reason I can't get them to run from crontab. I've tried adding a command at the end to echo some words to a file, and that works, so I know the crontab job is running when I tell it to.

What am I doing wrong?

You can't run a graphic program from cron without some additions. There won't be a DISPLAY environment variable set when it runs.
Also it's normally better to put commands that need to be run as root in root's crontab (rather than your unprivileged user's crontab with sudo). Edit that with sudo crontab -e