gsutil Cheatsheet
Check Directory Size
gsutil du -sh gs://<path_to_directory>
Find the latest file in the directory
gsutil ls -l gs://<path_to_directory> | sort -k 2 | tail -1
Find the oldest file in the directory
gsutil ls -l gs://<path_to_directory> | sort -k 2 | head -2
Remove the files older than some time
For example let us say we want to delete the files created in year 2020
gsutil ls -l gs://<path_to_directory> | egrep 2020 | awk '{print $3}' | gsutil -m rm -I