Improve wiki on "Increasing the amount of inotify watchers"

[AxelTheGerman]

Hi,
I used Rails for years but now switched to Linux and for the first time ran into the issue of

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.

Thanks for having great documentation, however I was wondering if we should improve it.

It says for ArchLinux to write the new config to /etc/sysctl.d/40-max-user-watches.conf but on my machine I already had /etc/sysctl.d/50-max_user_watches.conf present which continued to overwrite the new limit I was trying to set.

Maybe we should add a note to check the /etc/sysctl.d/ directory for other config files that would overwrite the setting again? Maybe even add this grep command to check the users existing configuration:

$ grep -H -s "fs.inotify.max_user_watches" /etc/sysctl.d/*
/etc/sysctl.d/50-max_user_watches.conf:fs.inotify.max_user_watches=524288

Thanks!

[ColinDKelley]

@AxelTheGerman
Those sound like good improvements to make to the docs. Can you make a PR?

[seandunn]

Just to note that the error message given in the terminal currently directs anyone hitting this issue to the main README which doesn't include any information on dealing with it.

[ColinDKelley]

Oops, before deleting the wiki, I meant to copy the references from wiki into the README.

@seandunn How does this look?

#521

[seandunn]

That's perfect, thanks @ColinDKelley.