parallel-nuke — parallel process kill program
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
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.
- -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
- 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
- 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 \ options.
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 pssh host files,
provides a tremendous amount of flexibility.
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.
Written by Brent N. Chun <bnc@theether.org> and Andrew
McNabb <amcnabb@mcnabbs.org>.
http://code.google.com/p/parallel-ssh/