Angular-cli: ng serve doesn't properly watch files that are in subdirectories

[ginoconexion]

angular-cli does not properly watch files that are in subdirectories ..
My components are located in src/app/component/. To make them be correctly watched, i usually reinstall angular cli with the following commands :

npm uninstall -g angular-cli
npm cache clean
npm install -g angular-cli@latest

and

rm -rf node_modules dist tmp
npm install --save-dev angular-cli@latest
ng init

this works fine, when I do so my project files are perfectly watch. But when I reboot, I run ng serve, components files are no longer watched..
How to make angular correctly watch my component files located in subdirectories ?
When I move a component to src/app/, the component is correctly watched.

OS?

Xubuntu 16.04 x64

Versions.

angular-cli : 1.0.0.beta-18
node : 6.8.1

[ginoconexion]

WebStorm was showing me a warning which led me to this link
https://confluence.jetbrains.com/display/IDEADEV/Inotify+Watches+Limit
I increased the watch limit and my problem has been resolved !

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