https://developers.google.com/gmail/api/guides/push
The Gmail API provides server push notifications that let you watch for changes to Gmail mailboxes. You can use this feature to improve the performance of your application. It allows you to eliminate the extra network and compute costs involved with polling resources to determine if they have changed. Whenever a mailbox changes, the Gmail API notifies your backend server application.
OAuth Playground https://developers.google.com/google-ads/api/docs/oauth/playground
Another option for generating OAuth2 credentials is to use the OAuth2 Playground. The OAuth2 Playground, in conjunction with the Google API Console, allows you to manually create OAuth2 tokens.
Watch https://developers.google.com/gmail/api/guides/push#watch_request
Stop https://developers.google.com/gmail/api/guides/push#stopping_mailbox_updates
https://cloud.google.com/storage/docs/gcs-fuse
https://github.com/GoogleCloudPlatform/gcsfuse
Cloud Storage FUSE helps you make better and quicker use of Cloud Storage by allowing file-based applications to use Cloud Storage without rewriting their I/O code. It is ideal for use cases where Cloud Storage has the right performance and scalability characteristics for an application, and only the file system semantics are missing
Top 50 TWiGCP links of 2019 https://medium.com/google-cloud/top-50-twigcp-links-of-2019-af2d2bccd83e
Cloud SDK Quickstart for Debian and Ubuntu https://cloud.google.com/sdk/docs/downloads-apt-get
Introduction https://www.grymoire.com/Unix/Sed.html
Remove leading spaces from each line using sed https://www.cyberciti.biz/tips/delete-leading-spaces-from-front-of-each-word.html
Replace occurrences https://www.geeksforgeeks.org/sed-command-in-linux-unix-with-examples/
Remove lines https://www.folkstalk.com/2013/03/sed-remove-lines-file-unix-examples.html
re2 https://github.com/google/re2/wiki/Syntax
BigQuery provides regular expression support using the re2 library; see that documentation for its regular expression syntax.