react-native watchman error, after npm start on Ubuntu 17.10.

I am trying to start project of React-native on Ubuntu, node,npm are at latest versions. according to documentation I have Install all official create-react-native-app and its dependencies.

here is my output screen after npm start

gd@gd:~/Desktop$ cd testing7/
gd@gd:~/Desktop/testing7$ npm start
> testing7@0.1.0 start /home/gd/Desktop/testing7
> react-native-scripts start
10:01:07: Starting packager...
***ERROR STARTING PACKAGER***
Starting React Native packager...
Scanning folders for symlinks in /home/gd/Desktop/testing7/node_modules (44ms)
Loading dependency graph.
jest-haste-map: Watchman crawl failed. Retrying once with node crawler. Usually this happens when watchman isn't running. Create an empty `.watchmanconfig` file in your project's root folder or initialize a git or hg repository in your project. Error: Watchman error: A non-recoverable condition has triggered. Watchman needs your help!
The triggering condition was at timestamp=1523075484: opendir(/home/gd/Desktop/testing7/node_modules/metro/node_modules/ansi-regex) -> The user limit on the total number of inotify watches was reached; increase the fs.inotify.max_user_watches sysctl
All requests will continue to fail with this message until you resolve
the underlying problem. You will find more information on fixing this at Make sure watchman is running for this project. See 

4 Answers

Try these two commands

`watchman watch-del-all`
`watchman shutdown-server`

try this command:

echo 256 | sudo tee -a /proc/sys/fs/inotify/max_user_instances
echo 32768 | sudo tee -a /proc/sys/fs/inotify/max_queued_events
echo 65536 | sudo tee -a /proc/sys/fs/inotify/max_user_watches
watchman shutdown-server

0

run following commands or make bash files with following contents and

run as bash yourfilename.sh

touch .watchmanconfig
watchman watch-del-all
watchman shutdown-server
sudo pkill -9 -x fseventsd
echo fs.inotify.max_user_instances=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
echo fs.inotify.max_queued_events=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p

1

For troubleshooting WatchMan errors check out this page here

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