ARCHIVED: In Unix, what is rcp, and how do I use it?
Note: The software discussed here is no longer in common use at IU, and UITS may no longer be able to verify this text's accuracy; additionally, the UITS Support Center may no longer have the materials needed to adequately support this software.
Note: Because rcp
is inherently insecure, UITS strongly recommends that you do not use it. UITS computers will not accept rcp
requests. For a secure alternative, try scp, which is installed on all UITS Unix computers.
The rcp
command is used to copy files between different computers without starting an FTP session or logging into the remote system explicitly. To use the rcp
command, you must have every system you intend to use as a source or destination in your .rhosts
file.
The syntax for the rcp
command is as follows:
rcp filename1 filename2 rcp filename1 ... directory
In the example above, each instance of filename
or directory
is in the form hostname:filename
. If the file is on your local system, you can omit hostname:
.
For example, if you are on a computer called motorhead.rock.net
and you want to copy the files foo.c
, bar.c
, and baz.c
to a directory called source
in your account on a computer called ministry.rock.net
, you would enter the following:
rcp foo.c bar.c baz.c ministry:source
There are a number of problems you might encounter when trying to use rcp
:
- Wildcards on the remote system must be in quotes. This is because the Unix shell expands unquoted wildcards, not the
rcp
command. - If you copy a file onto itself by accident, your file will be trashed.
- Copying symbolic links with
rcp
doesn't work. In this case, you're better off using FTP or the tar command instead.
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Last modified on 2018-01-18 12:13:37.