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cat /source/hugefile.mkv > /destination/hugefile.mkv If you want to know your exact speed (MB/s) and ETA, pipe through pv (Pipe Viewer).

cp -r /source /destination Then you wait. And wait. Your terminal freezes. Your disk thrashes. You realize you have no idea if it’s working or if it has silently crashed. mega cp files

pv /source/50gb.vmdk > /destination/50gb.vmdk This gives you a beautiful, real-time progress bar: [==>] 45% ETA 0:02:15 1.2GB/s The worst scenario for cp -r is a folder with millions of tiny files (like a node_modules folder or a cache directory). cp has to ask the filesystem for permission for every single file . cat /source/hugefile

Stream them as a single archive.