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       zssh - interactive file transfer wrapper for ssh


       zssh [zssh options] [--] [ssh options]
       ztelnet [zssh options] [--] [telnet options]


       zssh  (Zmodem SSH) is a program for interactively transferring files to
       a remote machine while using the secure shell ( ssh ). It  is  intended
       to  be  a  convenient  alternative  to scp , allowing to transfer files
       without having to open another session and re-authenticate oneself.

       zssh is  an  interactive  wrapper  for  ssh  used  to  switch  the  ssh
       connection  between  the  remote  shell  and  file  transfers.  This is
       achieved by using another tty/pty pair between the user and  the  local
       ssh  process  to  plug  either  the  user's  tty (remote shell mode) or
       another process (file transfer mode) on the ssh connection.

       ztelnet behaves similarly to zssh, except telnet  is  used  instead  of
       ssh.  It is equivalent to 'zssh -s "telnet -8 -E"'

       Files  are transferred through the zmodem protocol, using the rz and sz

       zssh behaves as an usual ssh  session  until  the  escape  sequence  is
       depressed ( default is ^@ which can be produced by pressing C-space, or
       C-2, or C-` ), which enables file transfer mode. A new prompt  is  then
       displayed,  and  commands  can  be  executed  locally  to initiate file
       transfers (among other things). It roughly behaves  as  a  local  shell
       featuring line edition, history and completion (thanks to libreadline),
       globbing, and escape characters ( " ' and \ ).

       The following builtins are handled by zssh itself: ?  , cd , disconnect
       ,  escape  ,  exit  , help , hook , quit , repeat , rz , suspend , sz ,

       cd <dir>            change current directory

       disconnect          disconnect and exit

       escape [^X]         Change escape key to ^X.  Without  argument,  print
                           current escape key

       exit                exit  file  transfer  mode. ^D may also be used for
                           this purpose.

       help                print help and tips

       hook prg [args]     Hook program 'prg' on the  the  pty.  Its  standard
                           input and output will go through the ssh channel.
                           typing  'sz'/'rz'  is  in  fact equivalent to 'hook
                           sz'/'hook rz'
                           A weird imagination is most  useful  to  gain  full
                           advantage of this feature.

       quit                same as exit.

       repeat              repeats  cmd  forever (^C to interrupt). Useful for
                           example if you use a remote  script  invoking  "sz"
                           and  you  don't want to be typing "rz" each time...
                           Remember  however  that  several   files   can   be
                           transferred  by  a single sz/rz pair so this is not
                           usually necessary to use repeat.

       rz                  Receive files from the remote machine. runs rz  and
                           plugs  the  process on the ssh connection.  running
                           sz on the REMOTE machine is required :
                           1)   run `sz <remote_file>  ...'  from  the  remote
                                machine shell
                           2)   press  the  escape sequence (C-space) to enter
                                file transfer mode
                           3)   run the `rz' builtin

       suspend             suspend zssh (back to the local machine shell)

       sz <file> ...       Send files to the remote machine. runs sz and plugs
                           the  process  on  the  ssh connection.  There is no
                           need to manually run rz on the remote side.

       version             print version information

       builtins rz , sz , hook and exit return to shell mode after completion.


       --force             Do not ask user any question

       --help              show basic help

       -s cmd
       --shell cmd         run cmd as remote shell instead of the default "ssh
                           -e none" (zssh) or "telnet -8 -E" (ztelnet)
                           ex: zssh -s "rsh -x"

       --version           show version

       -z ^X
       --zssh-escape ^X    set escape sequence to ^X

       -- may be used to separate zssh options from ssh ones
       Other arguments are passed verbatim to ssh/telnet/whatever.


                 Setting   the   ZSSHESCAPE  environment  variable  allows  to
                 override  the  default  escape  sequence.  ZSSHESCAPE  should
                 contain only two characters of the form `^X', meaning that ^X
                 is to be the new escape sequence.


       the following binaries need to be properly installed for zssh to work :

                 the remote shell to be executed (local machine)

       sz rz     zmodem send and receive programs. Should be both on local and
                 remote machine, and (hopefully) of compatible versions.


       If file transfer is initiated but never completes
       ( ie a line like :
           Bytes Sent:  38144/4610624   BPS:3424     ETA 22:15
           Bytes  Sent:       0/    513   BPS:0        ETA 00:00  Retry 0: Got
         can be seen, but transfer never completes
       Chances are the pty/tty on one of the  systems  are  not  8-bit  clean.
       (Linux is 8-bit clean, NetBSD is not).
       Using the -e (escape) option of rz should solve this problem.

       Transfers can be interrupted with ^C (somewhat experimental =)

       If you get stuck in rz/sz (for example you've just ran rz, but you then
       decided not to transmit anything), hit a dozen ^X (Ctrl-X, not the zssh
       escape!) to stop it

       Use `sz -y <files>' to overwrite files on the other side


       You  may  sometimes have to hit return 2 or 3 times after file transfer
       completion in order get back to the  shell.  Some  digits  are  usually
       displayed; don't worry it won't harm (you or your term) ...

       the tty may (sometimes) be somewhat upset after an interrupted transfer
       ( using ^C ). typing `reset' in this case should help.

       no pipe, redirection (and other stuff) support in shell ...  but  after
       all there are already wonderful shells around =)


       ttssh's author - Robert O'Callahan - for the original idea

       The sourceforge team.


       Matthieu Lucotte <>

       zssh homepage:


       ssh(1), telnet(1), scp(1), sz(1), rz(1), readline(3),

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