[ubuntu] gFTP or rsync question

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http://ubuntuforums.org – ubuntu 12.04 Concerning gFTP. I had to terminate a 8 hour file gFTP transfer about half way through the transfer because of a lightning storm suddenly happening at my location. Can I have gFTP simply pick up where I left off in the transfer without having any corrupted data on the remote machine if I just tell gFTP to transfer the data again? --I mean, without also clicking OVERWRITE which would cause it to take the full 8 hours again? Thanks! :) (Hardware)