Following warning is being thrown on npm install command -
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.2 (node_modules\\rea
ct-
fsevents is dealt differently in mac and other linux system. Linux system ignores fsevents whereas mac install it. As the above error message states that fsevents is optional and it is skipped in installation process.
You can run npm install --no-optional command in linux system to avoid above warning.
Further information
https://github.com/npm/npm/issues/14185
https://github.com/npm/npm/issues/5095