Sysadmin

My personal favorite was when we were having issues with an ssh connection and discovered using the -P flag, which will allow you to resume transfers that disconnects and -z that enables compression.

So, for instance to get an ssh file transfer with resume support, using compression, you would use:

rsync -avPz -e ssh user@remote-ssh-server:/source destination

--info=progress2 for long transfers involving a large number of files. Gives continuously updated statistics on the whole transfer.