今天在生产环境中报错rails c中报了一个错误：
FATAL: Listen error: unable to monitor directories for changes. Visit https://github.com/guard/listen/wiki/Increasing-the-amount-of-inotify-watchers for info on how to fix this.
报错后想看一下错误日志显示如下：
tailf: log/xxxxxx.log: cannot add inotify watch (limit of inotify watches was reached).
其实这个错误直接访问提示网站告诉的挺详细的。
解决方案：
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
echo fs.inotify.max_user_watches=524288 | sudo tee /etc/sysctl.d/40-max-user-watches.conf && sudo sysctl --system
Listen error 错误和 limit of inotify watches was reached
原文：https://www.cnblogs.com/zhaojingyu/p/9297417.html