I set up to run notify-send every minute, $ crontab -l1 * * * * /usr/bin/notify-send -t 0 helloWhy does it not work? Do I need to restart OS after editing the crontab file?Does the following mean that cron is running?$ ps aux | grep -i cronroot      1038  0.0  0.0  23660  2420 ?        Ss   Apr20   0:00 cronCan I specify a more frequent schedule, such as 30 seconds? Can thetime be specified as decimals?0.5 * * * * /usr/bin/notify-send -t 0 hello
My cron job doesn't run
cron