Depending on what version and environment you are using, you have a few options. One option for any 6.7.X or lower is to use a content migration workflow(possibly would need development) which would migrate content from one server to another. Another option is to run an rysnc from the command line (syntax below):
rsync -rpog -e ssh user@servername:/path/syncing/from.* /path/syncing/to
Similarly there is a secure copy command(shown below). However, while secure copy preserves dates, rsync works a little faster.
scp -p user@servername:/path/copying/from.* /path/copying/to
Your last option for a 7.X environment is to build and run a spar, shown in the white papers, which would migrate the content as well.