更新 crontab

opencv-motion-detect/deployment/crontab

 */5 * * * * sync; echo 1 > /proc/sys/vm/drop_caches
-*/3 * * * * python  /root/work/opencv-pocs/opencv-motion-detect/upload_video.py
+*/3 * * * * python  /root/work/opencv-pocs/opencv-motion-detect/upload_video.py >>/var/log/syslog