Although cron requires that each entry in a crontab end in a newline character, neither the crontab command nor the cron daemon will detect this
error. Instead, the crontab will appear to load normally. However, the command will never run. The best choice is to ensure that your crontab has a
blank line at the end.
آخر فایل crontab یک خط خالی داره یا نه؟ اگه نباشه کلا هیچی کار نمیکنه
crontab -l
# m h dom mon dow command
30 6 * * * /usr/bin/poff -a
0 3 * * * env DISPLAY=:0 /usr/bin/deluge
0 3 * * * env DISPLAY=:0 /usr/bin/d4x
58 2 * * * /home/hamed/.autoppp/autoppp
خروجی crontab -l من اینطوریه. به خط خالی آخر فایل crontab توجه کن