Download files from GCE

// from GCE to local directory Temp
$ gcloud compute scp prod-server-2:/usr/local/xxx/current/log/xxx.log.gz ~/Temp/

Upload files to GCE

$ gcloud compute scp --recurse ./sixty xxx-sandbox-jp-arb-1:~/scripts
// change the folder ownership 
$ sudo chown -R dev:dev /home/dev/sixty