NAME

       parallel-scp — parallel file upload program

SYNOPSIS

       parallel-scp [-vAr] [-h hosts_file] [-H [user@]host[:port]] [-l user] [-p par] [-o outdir]
       [-e errdir] [-t timeout] [-O options] [-x args] [-X arg] local remote

DESCRIPTION

       parallel-scp is a program for copying files in parallel to a number of hosts using the scp
       program.   It provides features such as passing a password to scp, saving output to files,
       and timing out.

OPTIONS

       -h host_file
       --hosts host_file
              Read hosts from the given host_file.  Lines in  the  host  file  are  of  the  form
              [user@]host[:port]  and  can include blank lines and comments (lines beginning with
              "#").  If multiple host files are given (the -h option is  used  more  than  once),
              then  parallel-scp  behaves as though these files were concatenated together.  If a
              host is specified multiple times, then parallel-scp will connect the  given  number
              of times.

       -H     [user@]host[:port]
       --host [user@]host[:port]
       -H     "[user@]host[:port] [ [user@]host[:port ] ... ]"
       --host "[user@]host[:port] [ [user@]host[:port ] ... ]"
              Add the given host strings to the list of hosts.  This option may be given multiple
              times, and may be used in conjunction with the -h option.

       -l user
       --user user
              Use the given username as the default for any host entries that don't  specifically
              specify a user.

       -p parallelism
       --par parallelism
              Use the given number as the maximum number of concurrent connections.

       -t timeout
       --timeout timeout
              Make  connections  time  out after the given number of seconds.  With a value of 0,
              parallel-scp will not timeout any connections.

       -o outdir
       --outdir outdir
              Save standard output to files in the given directory.  Filenames are  of  the  form
              [user@]host[:port][.num]  where  the user and port are only included for hosts that
              explicitly specify them.  The number is a counter that is incremented each time for
              hosts that are specified more than once.

       -e errdir
       --errdir errdir
              Save  standard  error  to  files in the given directory.  Filenames are of the same
              form as with the -o option.

       -x args
       --extra-args args
              Passes extra  SSH  command-line  arguments  (see  the  ssh(1)  man  page  for  more
              information  about  SSH  arguments).   This option may be specified multiple times.
              The arguments are processed to split on whitespace, protect text within quotes, and
              escape  with  backslashes.   To  pass arguments without such processing, use the -X
              option instead.

       -X arg
       --extra-arg arg
              Passes a single SSH command-line  argument  (see  the  ssh(1)  man  page  for  more
              information about SSH arguments).  Unlike the -x option, no processing is performed
              on  the  argument,  including  word  splitting.   To  pass  multiple   command-line
              arguments, use the option once for each argument.

       -O options
       --options options
              SSH options in the format used in the SSH configuration file (see the ssh_config(5)
              man page for more information).  This option may be specified multiple times.

       -A
       --askpass
              Prompt for a password and pass it to ssh.  The password may be used for  either  to
              unlock  a  key  or  for  password authentication.  The password is transferred in a
              fairly secure manner (e.g., it will not show up in argument  lists).   However,  be
              aware that a root user on your system could potentially intercept the password.

       -v
       --verbose
              Include error messages from ssh with the -i and -e options.

       -r
       --recursive
              Recursively copy directories.

TIPS

       The  ssh_config  file  can  include an arbitrary number of Host sections.  Each host entry
       specifies ssh options which apply only to the  given  host.   Host  definitions  can  even
       behave  like aliases if the HostName option is included.  This ssh feature, in combination
       with parallel-ssh host files, provides a tremendous amount of flexibility.

EXIT STATUS

       The exit status codes from parallel-scp are as follows:

       0      Success

       1      Miscellaneous error

       2      Syntax or usage error

       3      At least one process was killed by a signal or timed out.

       4      All processes completed, but at least one  scp  process  reported  an  error  (exit
              status other than 0).

AUTHORS

       Written by Brent N. Chun <bnc@theether.org> and Andrew McNabb <amcnabb@mcnabbs.org>.

       https://github.com/lilydjwg/parallel-ssh

SEE ALSO

       ssh(1),  ssh_config(5),  parallel-ssh(1),  parallel-rsync(1), parallel-slurp(1), parallel-
       nuke(1),

                                         January 24, 2012                         parallel-scp(1)