不同机器间的复制:SCP与RCP

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SCP(1)                    BSD General Commands Manual                   SCP(1)
NAME
     scp - secure copy (remote file copy program)
SYNOPSIS
     scp [-pqrvBC46] [-F ssh_config] [-S program] [-P port] [-c cipher]
         [-i identity_file] [-o ssh_option] [[user@]host1:]file1 [...]
         [[user@]host2:]file2
DESCRIPTION
     scp copies files between hosts on a network.  It uses ssh(1) for data
     transfer, and uses the same authentication and provides the same security
     as ssh(1).  Unlike rcp(1), scp will ask for passwords or passphrases if
     they are needed for authentication.
     Any file name may contain a host and user specification to indicate that
     the file is to be copied to/from that host.  Copies between two remote
     hosts are permitted.
     The options are as follows:
     -c cipher
             Selects the cipher to use for encrypting the data transfer.  This
             option is directly passed to ssh(1).
     -i identity_file
             Selects the file from which the identity (private key) for RSA
             authentication is read.  This option is directly passed to
             ssh(1).
     -p      Preserves modification times, access times, and modes from the
             original file.
     -r      Recursively copy entire directories.
     -v      Verbose mode.  Causes scp and ssh(1) to print debugging messages
             about their progress.  This is helpful in debugging connection,
             authentication, and configuration problems.
     -B      Selects batch mode (prevents asking for passwords or
             passphrases).
     -q      Disables the progress meter.
     -C      Compression enable.  Passes the -C flag to ssh(1) to enable com-
             pression.
     -F ssh_config
             Specifies an alternative per-user configuration file for ssh.
             This option is directly passed to ssh(1).
     -P port
             Specifies the port to connect to on the remote host.  Note that
             this option is written with a capital 'P', because -p is already
             reserved for preserving the times and modes of the file in
             rcp(1).
     -S program
             Name of program to use for the encrypted connection.  The program
             must understand ssh(1) options.
     -o ssh_option
             Can be used to pass options to ssh in the format used in
             ssh_config(5).  This is useful for specifying options for which
             there is no separate scp command-line flag.  For example, forcing
             the use of protocol version 1 is specified using scp
             -oProtocol=1.
     -4      Forces scp to use IPv4 addresses only.
     -6      Forces scp to use IPv6 addresses only.
DIAGNOSTICS
     scp exits with 0 on success or >0 if an error occurred.
AUTHORS
     Timo Rinne  and Tatu Ylonen
HISTORY
     scp is based on the rcp(1) program in BSD source code from the Regents of
     the University of California.
SEE ALSO
     rcp(1), sftp(1), ssh(1), ssh-add(1), ssh-agent(1), ssh-keygen(1),
     ssh_config(5), sshd(8)
BSD                           September 25, 1999                           BSD
===============================================================================
RCP(1)                                                                  RCP(1)
NAME
       rcp - remote file copy
SYNOPSIS
       rcp [-p] [-x] [-k realm ] [-D port] [-N] [-PN | -PO] file1 file2
       rcp  [-p]  [-x]  [-k  realm]  [-r]  [-D port] [-N] [-PN | -PO] file ...
       directory
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-
      
[email=pal/instance@realm]pal/instance@realm[/email]
.  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).
       -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).
       Rcp  handles  third party copies, where neither source nor target files
       are  on  the  current  machine.   Hostnames  may  also  take  the  form
      
[email=``rname@rhost'']``rname@rhost''[/email]
  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), 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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