Provided by: zssh_1.5c.debian.1-7build1_amd64 bug


       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

       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 commands.

       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 , version

       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

       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

       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 one 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 ZCAN
         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),