Unable to start application via npm start

Description

I am not able to start application via npm start

Expected Behavior

I am able to start application and visit in my iPhone.

Observed Behavior

Application does not start. Full terminal output is:

$ npm start

> Ruzenec_iOS@0.1.0 start /home/phracek/work/programming/Ruzenec_iOS
> react-native-scripts start

10:35:25 AM: Unable to start server
  See https://git.io/v5vcn for more information, either install watchman or run the following snippet:
    sudo sysctl -w fs.inotify.max_user_instances=1024
    sudo sysctl -w fs.inotify.max_user_watches=12288

npm ERR! Linux 4.13.11-200.fc26.x86_64
npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "start"
npm ERR! node v6.11.5
npm ERR! npm  v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! Ruzenec_iOS@0.1.0 start: `react-native-scripts start`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the Ruzenec_iOS@0.1.0 start script 'react-native-scripts start'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the Ruzenec_iOS package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     react-native-scripts start
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs Ruzenec_iOS
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls Ruzenec_iOS
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /home/phracek/work/programming/Ruzenec_iOS/npm-debug.log

Environment

Please run these commands in the project folder and fill in their results:

• npm ls react-native-scripts:

Ruzenec_iOS@0.1.0 /home/phracek/work/programming/Ruzenec_iOS
└── react-native-scripts@1.7.0

• npm ls react-native:

Ruzenec_iOS@0.1.0 /home/phracek/work/programming/Ruzenec_iOS
└── react-native@0.49.5 

• npm ls expo:

Ruzenec_iOS@0.1.0 /home/phracek/work/programming/Ruzenec_iOS
└─┬ expo@22.0.4 
  └── UNMET PEER DEPENDENCY react@>=15.4.0

• node -v: v6.11.5
• npm -v: 3.10.10
• yarn --version:

bash: yarn: command not found...
Packages providing this file are:
'hadoop-yarn'
'cmdtest'

• watchman version:

Also specify:

1. Operating system: Linux
2. Phone/emulator/simulator & version:

Reproducible Demo

Please provide a minimized reproducible demonstration of the problem you’re reporting. I went through documentation mentioned here https://facebook.github.io/react-native/docs/getting-started.html

[kajm]

have you tried both commands: sudo sysctl -w fs.inotify.max_user_instances=1024 sudo sysctl -w fs.inotify.max_user_watches=12288 they worked for me

[farmcp]

@kajm what does those commands actually do?