Example
$ rsync -avhW --progress some_dir/ some_dest/
Legend
-a: archive mode, same as -rlptgoD
-r: recurse into directories 
-l: copy symlinks as symlinks 
-p: preserve permissions 
-t: preserve times 
-g: preserve group 
-o: preserve owner (may require sudo) 
-D: same as --devices and --specials
--devices: preserve device files (may require sudo) 
--specials: preserve "special" files (eg. named sockets, fifos) 
 
 
-v: verbose 
-h: "human-readable" units 
-W: copy whole files at a time (avoid overhead of rsync diff algorithm) 
--progress: show progress during transfer