Here is the couple commands for the Android & React Native

commands.js

/*******************
* Android
*******************/

Where is the emuator in your directory:
/root/Android/Sdk/emulator

 $> ./emulator -list-avds  


/*******************
* React Native
*******************/

 $> 

When you clone someone else react native repo,normally you have to run the packager server with this command to prevent internal server error.
$> react-native start --reset-cache

React Native init Project:
$> react-native run android
$> react-native start

Expo project:
$> npm start
$> npm run-android
$> expo start

Font Styles, types and names list could be found on this link:

Native base icon name list

Show mysql databases tables in readable pages pager less -SFX

To enable React Native logcat as compare to Chrome logs
adb logcat *:S ReactNative:V ReactNativeJS:V

adb logcat AndroidRuntime:E *:S

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

this is used when the watch-man is giving unexpected error and react-native project was not loading.

You can check what versions of dependencies are resolved using gradlew app:dependencies on your android folder. All play-services libs should resolve to the same version, and all support libs should resolve to the same version.

To kill the demon of the emulator.

Issues like

• adb server is out of date. killing...
  cannot bind 'tcp:5037': Address already in use ADB server didn't ACK failed to start daemon

• Error: device offline

badarshahzad:emulator$ netstat -tulpn|grep 5554
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 127.0.0.1:5554          0.0.0.0:*               LISTEN      14522/qemu-syst

Referance: https://stackoverflow.com/questions/10680417/error-device-offline/15883498

For IOS $ react-native log-ios
For Android $ react-native log-android

react-native bundle --platform android --dev false --entry-file index.js --bundle-output android/app/src/main/assets/index.android.bundle --assets-dest android/app/src/main/res
Reference: https://stackoverflow.com/questions/52777413/reactnative-metro-bundler-not-starting-automatically

react-native run-android --variant=release
react-native run-android --variant=debug

There is not debug.keystore in android

keytool -genkey -v -keystore debug.keystore -storepass android -alias androiddebugkey -keypass android -keyalg RSA -keysize 2048 -validity 10000