$ cat /proc/sys/fs/inotify/max_user_watches => inotify 확인
<임시로 늘리는 방법>
$ sudo sysctl fs.inotify.max_user_watches=524288
$ sudo sysctl -p
<영구적으로 늘리는 방법>
$ echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf
$ sudo sysctl -p
https://github.com/guard/listen/wiki/Increasing-the-amount-of-inotify-watchers#the-technical-details