Transferring Files
You may need to copy files between
computers. For instance, you can put a backup copy of an important
file you’re editing onto an account at a computer in
another building or another city. Or, Dr. Nelson could put a copy of
a data file from her local computer onto a central computer, where
her colleagues can access it. Or you might want to download 20 files
from an FTP server, but not want to go through the tedious process of
clicking on them one by one in a web browser window. If you need to
do this sort of thing often, you may be able to set up a networked
filesystem connection; then you’ll be able to use
the Finder or local programs such as cp and
mv. But Unix systems also have command-line tools
for transferring files between computers. These often work more
quickly than graphical tools. We explore them later in this section.
scp and rcp
Mac OS X includes both
scp (secure copy) and rcp
(remote copy) programs for copying files between two computers. In
general, you must have accounts on both computers to use these. The
syntax of scp and rcp are
similar to cp, but also let you add the remote
hostname to the start of a file or directory pathname. The syntax of
each argument is:
hostname:pathname
hostname: is needed only for remote files. You can copy from a remote computer to the local computer, from the local computer to a remote computer, or between two remote computers.
The scp program is much more secure than
rcp, so we suggest using scp to transfer private ...
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