Code:
root@sok-HP-ProBook-4520s:/usr/local/etc# motion
[0] Processing thread 0 - config file /usr/local/etc/motion.conf
[0] Motion 3.2.12 Started
[0] Motion going to daemon mode
[0] Exit motion, cannot create process id file (pid file) /var/run/motion/motion.pid:
How can I fix that error?