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RCP(1) RCP(1)
NAME
rcp - remote file copy
SYNOPSIS
rcp [-p] [-x] [-k realm ] [-c ccachefile] [-C configfile] [-D port]
[-N] [-PN | -PO] file1 file2
rcp [-p] [-x] [-k realm] [-r] [-D port] [-N] [-PN | -PO] file ...
directory
rcp [-f | -t] ...
DESCRIPTION
Rcp copies files between machines. Each file or directory argument is
either a remote file name of the form ''rhost:path'', or a local file
name (containing no ':' characters, or a '/' before any ':'s).
By default, the mode and owner of file2 are preserved if it already
existed; otherwise the mode of the source file modified by the
umask(2) on the destination host is used.
If path is not a full path name, it is interpreted relative to your
login directory on rhost. A path on a remote host may be quoted
(using \, ", or ?) so that the metacharacters are interpreted
remotely.
Rcp does not prompt for passwords; it uses Kerberos authentication
when connecting to rhost. Each user may have a private authorization
list in a file .k5login in his login directory. Each line in this
file should contain a Kerberos principal name of the form princi-
pal/instance@realm. If there is a ~/.k5login file, then access is
granted to the account if and only if the originater user is authenti-
cated to one of the principals named in the ~/.k5login file. Other-
wise, the originating user will be granted access to the account if
and only if the authenticated principal name of the user can be mapped
to the local account name using the aname -> lname mapping rules (see
krb5_anadd(8) for more details).
OPTIONS
-p attempt to preserve (duplicate) the modification times and
modes of the source files in the copies, ignoring the umask.
-x encrypt all information transferring between hosts.
-k realm
obtain tickets for the remote host in realm instead of the
remote host's realm as determined by krb_realmofhost(3).
-c ccachefile
change the default credentials cache file to ccachefile
-C configfile
change the default configuation file to configfile
-r if any of the source files are directories, copy each subtree
rooted at that name; in this case the destination must be a
directory.
-PN
-PO Explicitly request new or old version of the Kerberos ''rcmd''
protocol. The new protocol avoids many security problems found
in the old one, but is not interoperable with older servers.
(An "input/output error" and a closed connection is the most
likely result of attempting this combination.) If neither
option is specified, some simple heuristics are used to guess
which to try.
-D port
connect to port port on the remote machine.
-N use a network connection, even when copying files on the local
machine (used for testing purposes).
-f -t These options are for internal use only. They tell the
remotely-running rcp process (started via the Kerberos remote
shell daemon) which direction files are being sent. These
options should not be used by the user. In particular, -f does
not mean that the user's Kerberos ticket should be forwarded!
Rcp handles third party copies, where neither source nor target files
are on the current machine. Hostnames may also take the form
''rname@rhost'' to use rname rather than the current user name on the
remote host.
FILES
~/.k5login (on remote host) - file containing Kerberos principals
that are allowed access.
SEE ALSO
cp(1), ftp(1), rsh(1), rlogin(1), kerberos(3), krb_getrealm(3),
kshd(8), rcp(1) [UCB version]
BUGS
Rcp doesn't detect all cases where the target of a copy might be a
file in cases where only a directory should be legal.
Rcp is confused by any output generated by commands in a .login, .pro-
file, or .cshrc file on the remote host.
Kerberos is only used for the first connection of a third-party copy;
the second connection uses the standard Berkeley rcp protocol.
RCP(1)
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