NAME

       parallel-nuke — parallel process kill program

SYNOPSIS

       parallel-nuke  [-vA]  [-h  hosts_file] [-H [user@]host[:port]] [-l user] [-p par] [-o outdir] [-e errdir]
       [-t timeout] [-O options] [-x args] [-X arg] pattern

DESCRIPTION

       parallel-nuke is a program for killing processes in parallel on a number of hosts.  It provides  features
       such as passing a password to ssh, 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-nuke behaves as though these files
              were concatenated together.  If a host  is  specified  multiple  times,  then  parallel-nuke  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-nuke
              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.

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.

       Internally uses the pkill command and sends signal 9 (the unblockable KILL signal).

EXIT STATUS

       The exit status codes from parallel-nuke 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 ssh process reported an error (exit status 255).

       5      There were no ssh errors, but at least one remote command had a non-zero exit status.

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-scp(1), parallel-rsync(1), parallel-slurp(1),

                                                January 24, 2012                                parallel-nuke(1)