Maria DB keeps dying after restart every hour, shows following error:

Mar 06 09:03:15 freeubuntu systemd[1]: mariadb.service: Start operation timed out. Terminating.
Mar 06 09:03:17 freeubuntu systemd[1]: mariadb.service: Failed with result ‘timeout’.
Mar 06 09:03:17 freeubuntu systemd[1]: Failed to start MariaDB 10.3.28 database server.

The Maria db itself is working fine, but seems the start didn’t return to systemctl correctly, so systemctl kills it after some time – around 1 hour as I can see after system reboot

I installed and later un-installed a MySql before installing the MariaDB 10.3, not sure if this is related, but seems not.

Following 2 blog shows how to resolve the issue

https://askubuntu.com/questions/750604/why-does-mariadb-keep-dying-how-do-i-stop-it

https://askubuntu.com/questions/175820/mysql-doesnt-update-due-to-error-in-apparmor-profile

Following is a simple sample on building an demo react-native app
With basic navigations

1, Create a sample app
npm expo-cli init MyApp --npm

2, Install React Navigation
npm install react-navigation

3, Install dependencies
expo install react-native-gesture-handler react-native-reanimated react-native-screens react-native-safe-area-context @react-native-community/masked-view
npm install react-navigation-stack @react-native-community/masked-view

4, Install React Navigation Stack
npm install react-navigation

5, Start the app and clear cache
expo r -c