[Ruby on rails] The rails db: migrate: reset command displays FATAL: Listen error: unable to monitor directories for changes. [Rails tutorial]

About the error

An error occurred when executing the following command.

rails db:migrate:reset

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.

approach

After investigating, it seems that it can be dealt with by changing the instance limit of inotify. Check the following files with cat.

cat /proc/sys/fs/inotify/max_user_instances 

128

We will change from 128 to 524288. Add to the configuration file.

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf

fs.inotify.max_user_watches=524288

Reflects the added file.

sudo sysctl -p

Execute the command that was in error again.

rails db:migrate:reset

The command passed successfully!