=== Copy files ===
See: https://cloud.google.com/sdk/gcloud/reference/compute/copy-files
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gcloud compute copy-files [[USER@]INSTANCE:]SRC [[[USER@]INSTANCE:]SRC …] [[USER@]INSTANCE:]DEST [--dry-run] [--plain] [--ssh-key-file SSH_KEY_FILE] [--zone ZONE] [GLOBAL-FLAG …]
gcloud compute copy-files ~/LOCAL-FILE-1 example-instance:~/REMOTE-DIR --zone us-central1-a
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The ssh command was