1CRSH(1)               User Contributed Perl Documentation              CRSH(1)
2
3
4

NAME

6       crsh - Cluster administration tool
7

VERSION

9       This documentation is for version: 4.16
10

SYNOPSIS

12       crsh [-a '<command>'] [-K <seconds>] [-q] [-c '<filename>'] [-x <cols>]
13       [-C '<filename>'] [--debug [[...] || <INTEGER>]] [-d] [-e
14       '<[user@]<host>[:port]>'] [--fillscreen] [-f '<font>'] [-h] [-L
15       '[tag]'] [-H] [-o '<STRING>'] [-p <port>] [-Q] [-y <rows>] [-s] [-r
16       '<filename>'] [-t '<STRING>'] [-g] [-T '<title>'] [-u] [-?] [-A] [-l
17       '<username>'] [-v]
18
20       Also see the individual man pages for each of these utilities
21
22       ccon - Use 'console' as the communication method
23       csftp - Use 'sftp' as the communication method
24       cssh - Use 'ssh' as the communication method
25       ctel - Use 'telnet' as the communication method
26

DESCRIPTION

28       The command opens an administration console and an xterm to all
29       specified hosts.  Any text typed into the administration console is
30       replicated to all windows.  All windows may also be typed into
31       directly.
32
33       This tool is intended for (but not limited to) cluster administration
34       where the same configuration or commands must be run on each node
35       within the cluster.  Performing these commands all at once via this
36       tool ensures all nodes are kept in sync.
37
38       Connections are opened using rsh which must be correctly installed and
39       configured.
40
41       Extra caution should be taken when editing files as lines may not
42       necessarily be in the same order;  assuming line 5 is the same across
43       all servers and modifying that is dangerous.  It's better to search for
44       the specific line to be changed and double-check all terminals are as
45       expected before changes are committed.
46
47   Further Notes
48       Please also see "KNOWN BUGS".
49
50       •   The dotted line on any sub-menu is a tear-off, i.e. click on it and
51           the sub-menu is turned into its own window.
52
53       •   Unchecking a hostname on the Hosts sub-menu will unplug the host
54           from the cluster control window, so any text typed into the console
55           is not sent to that host.  Re-selecting it will plug it back in.
56
57       •   If your window manager menu bars are obscured by terminal windows
58           see the "screen_reserve_XXXXX" options in the
59           $HOME/.clusterssh/config file (see "FILES").
60
61       •   If the terminals overlap too much see the "terminal_reserve_XXXXX"
62           options in the $HOME/.clusterssh/config file (see "FILES").
63
64       •   When using ClusterSSH on a large number of systems to connect to a
65           single system using an SSH utility (e.g. you issue a command to to
66           copy a file using scp from the remote computers to a single host)
67           and when these connections require authentication (i.e. you are
68           going to authenticate with a password), the sshd daemon at that
69           location may refuse connections after the number "MaxStartups"
70           limit in sshd_config is exceeded.  (If this value is not set, it
71           defaults to 10).  This is expected behavior; sshd uses this
72           mechanism to prevent DoS attacks from unauthenticated sources.
73           Please tune sshd_config and reload the SSH daemon, or consider
74           using the ~/.ssh/authorized_keys mechanism for authentication if
75           you encounter this problem.
76
77       •   If client windows fail to open, try running:
78
79           "crsh -e {single host name}"
80
81           This will test the mechanisms used to open windows to hosts.  This
82           could be due to either the "-xrm" terminal option which enables
83           "AllowSendEvents" (some terminals do not require this option, other
84           terminals have another method for enabling it - see your terminal
85           documentation) or the configuration of "rsh".
86

OPTIONS

88       Some of these options may also be defined within the configuration
89       file.  Default options are shown as appropriate.
90
91       --action '<command>', -a '<command>'
92           Run the command in each session, e.g. "-a 'vi /etc/hosts'" to drop
93           straight into a vi session.
94
95       --autoclose <seconds>, -K <seconds>
96           Number of seconds to wait before closing finished terminal windows.
97
98       --autoquit, -q
99           Toggle automatically quitting after the last client window has
100           closed (overriding the config file).
101
102       --cluster-file '<filename>', -c '<filename>'
103           Use supplied file as additional cluster file (see also "FILES").
104
105       --cols <cols>, -x <cols>
106           Number of columns
107
108       --config-file '<filename>', -C '<filename>'
109           Use supplied file as additional configuration file (see also
110           "FILES").
111
112       --debug [[...] || <INTEGER>]
113           Enable debugging.  Either a level can be provided or the option can
114           be repeated multiple times.  Maximum level is 9.
115
116       --dump-config, -d
117           Dump the current configuration in the same format used by the
118           $HOME/.clusterssh/config file.
119
120       --evaluate '<[user@]<host>[:port]>', -e '<[user@]<host>[:port]>'
121           Display and evaluate the terminal and connection arguments to
122           display any potential errors.  The <hostname> is required to aid
123           the evaluation.
124
125       --fillscreen
126           Resize terminal windows to fill the whole available screen
127
128       --font '<font>', -f '<font>'
129           Specify the font to use in the terminal windows. Use standard X
130           font notation such as "5x8".
131
132       --help, -h
133           Show basic help text and exit
134
135       --list '[tag]', -L '[tag]'
136           List available cluster tags. Tag is optional.  If a tag is provided
137           then hosts for that tag are listed.  NOTE: format of output changes
138           when using "--quiet" or "-Q" option.
139
140       --man, -H
141           Show full help text (the man page) and exit
142
143       --options '<STRING>', -o '<STRING>'
144           Specify arguments to be passed to ssh when making the connection.
145           NOTE: options for ssh should normally be put into the ssh
146           configuration file; see "ssh_config" and $HOME/.ssh/config for more
147           details.
148
149           Default: -x -o ConnectTimeout=10
150
151       --port <port>, -p <port>
152           Specify an alternate port for connections.
153
154       --quiet, -Q
155           Do not output extra text when using some options
156
157       --rows <rows>, -y <rows>
158           Number of rows
159
160       --show-history, -s
161           Show history within console window.
162
163       --tag-file '<filename>', -r '<filename>'
164           Use supplied file as additional tag file (see also "FILES")
165
166       --term-args '<STRING>', -t '<STRING>'
167           Specify arguments to be passed to terminals being used.
168
169       --tile, -g
170           Toggle window tiling (overriding the config file).
171
172       --title '<title>', -T '<title>'
173           Specify the initial part of the title used in the console and
174           client windows.
175
176       --unique-servers, -u
177           Toggle connecting to each host only once when a hostname has been
178           specified multiple times.
179
180       --usage, -?
181           Show synopsis and exit
182
183       --use-all-a-records, -A
184           If a hostname resolves to multiple IP addresses, toggle whether or
185           not to connect to all of them, or just the first one (see also
186           config file entry).
187
188       --username '<username>', -l '<username>'
189           Specify the default username to use for connections (if different
190           from the currently logged in user).  NOTE: will be overridden by
191           <user>@<host>.
192
193       --version, -v
194           Show version information and exit
195

ARGUMENTS

197       The following arguments are supported:
198
199       [user@]<hostname>[:port] ...
200           Open an xterm to the given hostname and connect to the
201           administration console.  The optional port number can be used if
202           the server is not listening on the standard port.
203
204       <tag> ...
205           Open a series of xterms defined by <tag> in one of the
206           supplementary configuration files (see "FILES").
207
208           Note: specifying a username on a cluster tag will override any
209           usernames defined in the cluster.
210

KEY SHORTCUTS

212       The following key shortcuts are available within the console window,
213       and all of them may be changed via the configuration files.
214
215       Control-Shift-plus
216           Open the 'Add Host(s) or Cluster(s)' dialogue box.  Multiple host
217           or cluster names can be entered, separated by spaces.
218
219       Alt-n
220           Paste in the hostname part of the specific connection string to
221           each client, minus any username or port, e.g.
222
223           "scp /etc/hosts server:files/<Alt-n>.hosts"
224
225           would replace the <Alt-n> with the client's name in each window.
226
227       Alt-l
228           Paste in the hostname of the server cssh is being run on
229
230       Alt-q
231           Quit the program and close all connections and windows.
232
233       Alt-r
234           Retile all the client windows.
235
236       Alt-u
237           Paste in the username for the connection
238
239       Alt-1
240       Alt-2
241       Alt-3
242       Alt-4
243           Run the matching user defined macro on the server and send the
244           output to the client
245

EXAMPLES

247       Open up a session to 3 servers
248           $ crsh server1 server2 server3
249
250       Open up a session to a cluster of servers identified by the tag 'farm1'
251       and give the controlling window a specific title, where the tag is
252       defined in one of the default configuration files
253           $ crsh -T 'Web Farm Cluster 1' farm1
254
255       Connect to different servers using different login names.  NOTE: this
256       can also be achieved by setting up appropriate options in the
257       configuration files.  Do not close the console when the last terminal
258       exits.
259           $ crsh user1@server1 admin@server2
260
261       Open up a cluster defined in a non-default configuration file
262           $ crsh -c $HOME/cssh.extra_clusters db_cluster
263
264       Override the configured/default port to use 2022 instead
265           $ crsh -p 2022 server1 server2
266

FILES

268       /etc/clusters, $HOME/.clusterssh/clusters
269           These files contain a list of tags to server names mappings.  When
270           any name is used on the command line it is checked to see if it is
271           a tag.  If it is a tag, then the tag is replaced with the list of
272           servers.  The format is as follows:
273
274           <tag> [user@]<server>[:port] [user@]<server>[:port] [...]
275
276           e.g.
277
278               # List of servers in live
279               live admin1@server1 admin2@server2:2022 server3 server4
280
281           All comments (marked by a #) and blank lines are ignored.  Tags may
282           be nested, but be aware of using recursive tags as they are not
283           checked for.
284
285           Servers can be defined using expansion macros:
286
287           "webservers websvr{a,b,c}"
288
289           would be expanded to
290
291           "webservers websvra websvrb websvrc"
292
293           and
294
295           "webservers websvr{6..9}"
296
297           would be expanded to
298
299           "webservers websvr6 websvr7 websvr8 websvr9"
300
301           Extra cluster files may also be specified either as an option on
302           the command line (see "cluster-file") or in the user's
303           $HOME/.clusterssh/config file (see "extra_cluster_file"
304           configuration option).
305
306           NOTE: the last tag read overwrites any pre-existing tag of that
307           name.
308
309           NOTE: there is a special cluster tag called "default" - any tags or
310           hosts included within this tag will be automatically opened if
311           nothing is specified on the command line.
312
313       /etc/tags, $HOME/.clusterssh/tags
314           Very similar to clusters files but the definition is reversed.  The
315           format is:
316
317           <host> <tag> [...]
318
319           This allows one host to be specified as a member of a number of
320           tags.  This format can be clearer than using clusters files.
321
322           Extra tag files may be specified either as an option (see
323           "tag-file") or within the user's $HOME/.clusterssh/config file (see
324           "extra_tag_file" configuration option).
325
326           NOTE: All tags are added together
327
328       /etc/csshrc & $HOME/.clusterssh/config
329           This file contains configuration overrides - the defaults are as
330           marked.  Default options are overwritten first by the global file,
331           and then by the user file.
332
333           NOTE: values for entries do not need to be quoted unless it is
334           required for passing arguments, e.g.
335
336           "terminal_allow_send_events="-xrm '*.VT100.allowSendEvents:true'""
337
338           should be written as
339
340           "terminal_allow_send_events=-xrm '*.VT100.allowSendEvents:true'"
341
342           auto_close = 5
343               Close terminal window after this many seconds.  If set to 0
344               will instead wait on input from the user in each window before
345               closing. See also --autoclose and --no-autoclose
346
347           auto_quit = 1
348               Automatically quit after the last client window closes.  Set to
349               0 to disable.  See also --autoquit
350
351           auto_wm_decoration_offsets = no
352               Enable or disable alternative algorithm for calculating
353               terminal positioning.
354
355           command_pre =
356           command_post =
357               Add extra commands around the communication method.  For
358               example:
359
360               command_pre= . $HOME/virtualenvs/default/bin/active ;
361               command_post= | ct
362
363               would allow for using Python virtual envronments and then
364               piping all shell output through "chromaterm" for syntax
365               highlighting.  Note: you must use appropriate command
366               separators/terminators to keep the meaning of the command
367               pipline (such as ";" and "|" between commands).
368
369               These are not put through macro parsing.
370
371           comms = rsh
372               Sets the default communication method (initially taken from the
373               name of the program, but can be overridden here).
374
375           console_position = <null>
376               Set the initial position of the console - if empty then let the
377               window manager decide.  Format is '+<x>+<y>', i.e. '+0+0' is
378               top left hand corner of the screen, '+0-70' is bottom left hand
379               side of screen (more or less).
380
381           external_command_mode = 0600
382               File mode bits for the external_command_pipe.
383
384           external_command_pipe = <null>
385               Define the full path to an external command pipe that can be
386               written to for controlling some aspects of ClusterSSH, such as
387               opening sessions to more clusters.
388
389               Commands:
390
391               "open <tag|hostname>" - open new sessions to provided tag or
392               hostname
393
394               "retile" - force window retiling
395
396               e.g.: "echo 'open localhost'" /path/to/external_command_pipe >>
397
398           external_cluster_command = <null>
399               Define the full path to an external command that can be used to
400               resolve tags to host names.  This command can be written in any
401               language.  The script must accept a list of tags to resolve and
402               output a list of hosts (space separated on a single line).  Any
403               tags that cannot be resolved should be returned unchanged.
404
405               A non-0 exit code will be counted as an error, a warning will
406               be printed and output ignored.
407
408               If the external command is given a "-L" option it should output
409               a list of tags (space separated on a single line) it can
410               resolve
411
412           extra_cluster_file = <null>
413               Define an extra cluster file in the format of /etc/clusters.
414               Multiple files can be specified, separated by commas.  Both ~
415               and $HOME are acceptable as a reference to the user's home
416               directory, e.g.
417
418               "extra_cluster_file = ~/clusters, $HOME/clus"
419
420           extra_tag_file = <null>
421               Define an extra tag file in the format of /etc/tags.  Multiple
422               files can be specified, separated by commas.  Both ~ and $HOME
423               are acceptable as a reference to the user's home directory,
424               e.g.
425
426               "extra_tag_file = ~/tags, $HOME/tags"
427
428           key_addhost = Control-Shift-plus
429               Default key sequence to open AddHost menu.  See "KEY SHORTCUTS"
430               for more information.
431
432           hide_menu = 0
433               If set to 1, hide the menu bar (File, Hosts, Send, Help) in the
434               console.
435
436           key_clientname = Alt-n
437               Default key sequence to send cssh client names to client.  See
438               "KEY SHORTCUTS" for more information.
439
440           key_localname = Alt-l
441               Default key sequence to send hostname of local server to
442               client.  See "KEY SHORTCUTS" for more information.
443
444           key_paste = Control-v
445               Default key sequence to paste text into the console window.
446               See "KEY SHORTCUTS" for more information.
447
448           key_quit = Control-q
449               Default key sequence to quit the program (will terminate all
450               open windows).  See "KEY SHORTCUTS" for more information.
451
452           key_retilehosts = Alt-r
453               Default key sequence to retile host windows.  See "KEY
454               SHORTCUTS" for more information.
455
456           key_username = Alt-u
457               Default key sequence to send username to client.  See "KEY
458               SHORTCUTS" for more information.
459
460           key_user_1 = Alt-1
461           key_user_2 = Alt-2
462           key_user_3 = Alt-3
463           key_user_4 = Alt-4
464               Default key sequence to send user defined macros to client.  If
465               the matching macro_user_1 macro is undefined, the sequence is
466               passed straight to the terminal.  See "KEY SHORTCUTS" for more
467               information.
468
469           macro_servername = %s
470           macro_hostname = %h
471           macro_username = %u
472           macro_newline = %n
473           macro_version = %v
474           macro_user_1 = %1
475           macro_user_2 = %2
476           macro_user_3 = %3
477           macro_user_4 = %4
478               Change the replacement macro used when either using a 'Send'
479               menu item, or when pasting text into the main console.
480
481           macro_user_1_command =
482           macro_user_2_command =
483           macro_user_3_command =
484           macro_user_4_command =
485               User defined macros - the macro is run through the shell on the
486               server and the output is sent to the client.  For example,
487
488               "macro_user_1_command=echo echo macro_user_1"
489
490                           would send the text C<echo macro_user_1> into the terminal session.
491
492               "macro_user_1_command=env | grep CSSH"
493
494                           would send the CSSH environment variables to the client.
495
496               The following environment variables are set in the shell of the
497               macro process
498
499               "CSSH_SERVERNAME"
500               "CSSH_HOSTNAME"
501               "CSSH_USERNAME"
502               "CSSH_CONNECTION_STRING"
503               "CSSH_CONNECTION_PORT"
504               "CSSH_VERSION"
505           macros_enabled = yes
506               Enable or disable macro replacement.  Note: this affects all
507               the "macro_*" variables above.
508
509           max_addhost_menu_cluster_items = 6
510               Maximum number of entries in the 'Add Host' menu cluster list
511               before scrollbars are used
512
513           max_host_menu_items = 30
514               Maximum number of hosts to put into the host menu before
515               starting a new column
516
517           menu_host_autotearoff = 0
518           menu_send_autotearoff = 0
519               When set to non-0 will automatically tear-off the host or send
520               menu at program start
521
522           mouse_paste = Button-2 (middle mouse button)
523               Default key sequence to paste text into the console window
524               using the mouse.  See "KEY SHORTCUTS" for more information.
525
526           rsh = /path/to/rsh
527           ssh = /path/to/ssh
528           telnet = /path/to/telnet
529               Set the path to the specific binary to use for the
530               communication method, else uses the first match found in $PATH
531
532           rsh_args = <blank>
533           ssh_args = "-x -o ConnectTimeout=10"
534           telnet_args = <blank>
535               Sets any arguments to be used with the communication method
536               (defaults to ssh arguments).
537
538               NOTE: The given defaults are based on OpenSSH, not commercial
539               ssh software.
540
541               NOTE: Any "generic" change to the method (e.g., specifying the
542               ssh port to use) should be done in the medium's own config file
543               (see "ssh_config" and $HOME/.ssh/config).
544
545           screen_reserve_top = 0
546           screen_reserve_bottom = 60
547           screen_reserve_left = 0
548           screen_reserve_right = 0
549               Number of pixels from the screen's side to reserve when
550               calculating screen geometry for tiling.  Setting this to
551               something like 50 will help keep cssh from positioning windows
552               over your window manager's menu bar if it draws one at that
553               side of the screen.
554
555           terminal = /path/to/xterm
556               Path to the X-Windows terminal used for the client.
557
558           terminal_args = <blank>
559               Arguments to use when opening terminal windows.  Otherwise
560               takes defaults from $HOME/.Xdefaults or $HOME/.Xresources file.
561
562           terminal_chdir = 0
563               When non-0, set the working directory for each terminal as per
564               'terminal_chdir_path'
565
566           terminal_chdir_path = $HOME/.clusterssh/work/%s
567               Path to use as working directory for each terminal when
568               'terminal_chdir' is enabled.  The path provided is passed
569               through the macro parser (see the section above on
570               'macros_enabled'.
571
572           terminal_font = 6x13
573               Font to use in the terminal windows.  Use standard X font
574               notation.
575
576           terminal_reserve_top = 5
577           terminal_reserve_bottom = 0
578           terminal_reserve_left = 5
579           terminal_reserve_right = 0
580               Number of pixels from the terminal's side to reserve when
581               calculating screen geometry for tiling.  Setting these will
582               help keep cssh from positioning windows over your scroll and
583               title bars or otherwise overlapping the windows too much.
584
585           terminal_colorize = 1
586               If set to 1 (the default), then "-bg" and "-fg" arguments will
587               be added to the terminal invocation command-line.  The terminal
588               will be colored in a pseudo-random way based on the host name;
589               while the color of a terminal is not easily predicted, it will
590               always be the same color for a given host name.  After a while,
591               you will recognize hosts by their characteristic terminal
592               color.
593
594           terminal_bg_style = dark
595               If set to "dark", the terminal background will be set to black
596               and the foreground to the pseudo-random color.  If set to
597               "light", then the foreground will be black and the background
598               the pseudo-random color.  If terminal_colorize is "zero", then
599               this option has no effect.
600
601           terminal_size = 80x24
602               Initial size of terminals to use. NOTE: the number of lines
603               (24) will be decreased when resizing terminals for tiling, not
604               the number of characters (80).
605
606           terminal_title_opt = -T
607               Option used with "terminal" to set the title of the window
608
609           terminal_allow_send_events = -xrm '*.VT100.allowSendEvents:true'
610               Option required by the terminal to allow XSendEvents to be
611               received
612
613           title = cssh
614               Title of windows to use for both the console and terminals.
615
616           unmap_on_redraw = no
617               Tell Tk to use the UnmapWindow request before redrawing
618               terminal windows.  This defaults to "no" as it causes some
619               problems with the FVWM window manager.  If you are experiencing
620               problems with redraws, you can set it to "yes" to allow the
621               window to be unmapped before it is repositioned.
622
623           use_all_a_records = 0
624               If a hostname resolves to multiple IP addresses, set to 1 to
625               connect to all of them, not just the first one found.  See also
626               "--use-all-a-records"}
627
628           use_hotkeys = 1
629               Setting to 0 will disable all hotkeys.
630
631           use_natural_sort = 0
632               Windows will normally sort in alphabetical order, i.e.: host1,
633               host11, host2.  Setting to this 1 will change the sort order,
634               i.e.: host1, host2, host11. NOTE: You must have the perl module
635               Sort::Naturally installed.
636
637           user = $LOGNAME
638               Sets the default user for running commands on clients.
639
640           window_tiling = 1
641               Perform window tiling (set to 0 to disable)
642
643           window_tiling_direction = right
644               Direction to tile windows, where "right" means starting top
645               left and moving right and then down, and anything else means
646               starting bottom right and moving left and then up
647
648           NOTE: The key shortcut modifiers must be in the form "Control",
649           "Alt" or "Shift", e.g. with the first letter capitalised and the
650           rest lower case.  Keys may also be disabled individually by setting
651           to the word "null".
652
653       $HOME/.clusterssh/send_menu
654           This (optional) file contains items to populate the send menu.  The
655           default entry could be written as:
656
657             <send_menu>
658               <menu title="Use Macros">
659                   <toggle/>
660                   <accelerator>ALT-p</accelerator>
661               </menu>
662               <menu title="Remote Hostname">
663                   <command>%s</command>
664                   <accelerator>ALT-n</accelerator>
665               </menu>
666               <menu title="Local Hostname">
667                   <command>%s</command>
668                   <accelerator>ALT-l</accelerator>
669               </menu>
670               <menu title="Username">
671                   <command>%u</command>
672                   <accelerator>ALT-u</accelerator>
673               </menu>
674               <menu title="Test Text">
675                   <command>echo "ClusterSSH Version: %v%n</command>
676               </menu>
677             </send_menu>
678
679           Submenus can also be specified as follows:
680
681             <send_menu>
682               <menu title="Default Entries">
683                 <detach>yes</detach>
684                 <menu title="Hostname">
685                     <command>%s</command>
686                     <accelerator>ALT-n</accelerator>
687                 </menu>
688               </menu>
689             </send_menu>
690
691           Caveats:
692
693           There is currently no strict format checking of this file.
694           The format of the file may change in the future
695           If the file exists, the default entry (Hostname) is not added
696
697           The following replacement macros are available (note: these can be
698           changed in the configuration file):
699
700           %s  Hostname part of the specific connection string to each client,
701               minus any username or port
702
703           %u  Username part of the connection string to each client
704
705           %h  Hostname of server where cssh is being run from
706
707           %n  "RETURN" code
708
709           NOTE: requires XML::Simple to be installed
710

KNOWN BUGS

712       If you have any ideas about how to fix the below bugs, please get in
713       touch and/or provide a patch.
714
715       •   Swapping virtual desktops can cause a redraw of all the terminal
716           windows.  This is due to a lack of distinction within Tk between
717           switching desktops and minimising/maximising windows.  Until Tk can
718           tell the difference between the two events, there is no fix (apart
719           from rewriting everything directly in X).
720

TROUBLESHOOTING

722       If you have issues running crsh, first try:
723
724       "crsh -e [user@]<hostname>[:port]"
725
726       This performs two tests to confirm cssh is able to work properly with
727       the settings provided within the $HOME/.clusterssh/config file (or
728       internal defaults).
729
730       1.  Test the terminal window works with the options provided
731
732       2.  Test rsh works to a host with the configured arguments
733
734       Configuration options to watch for in ssh are:
735
736       •   SSH doesn't understand "-o ConnectTimeout=10" - remove the option
737           from the $HOME/.clusterssh/config file
738
739       •   OpenSSH-3.8 using untrusted ssh tunnels - use "-Y" instead of "-X"
740           or use "ForwardX11Trusted yes" in $HOME/.ssh/ssh_config (if you
741           change the default ssh options from "-x" to "-X")
742

SUPPORT AND REPORTING BUGS

744       A web site for comments, requests, bug reports and bug fixes/patches is
745       available at: <https://github.com/duncs/clusterssh>
746
747       If you require support, please run the following commands and create an
748       issue via: <https://github.com/duncs/clusterssh/issues>
749
750       "perl -V"
751
752       "perl -MTk -e 'print $Tk::VERSION,$/'"
753
754       "perl -MX11::Protocol -e 'print $X11::Protocol::VERSION,$/'"
755
756       "cat /etc/csshrc $HOME/.clusterssh/config"
757
758       Using the debug option (--debug) will turn on debugging output.  Repeat
759       the option to increase the amount of debug.  However, if possible
760       please only use this option with one host at a time, e.g. "cssh --debug
761       <host>" due to the amount of output produced (in both main and child
762       windows).
763

SEE ALSO

765       <https://github.com/duncs/clusterssh/wiki/>, "ssh", Tk::overview,
766       X11::Protocol, "perl"
767

AUTHOR

769       Duncan Ferguson, "<duncan_j_ferguson at yahoo.co.uk>"
770
772       Copyright 1999-2018 Duncan Ferguson.
773
774       This program is free software; you can redistribute it and/or modify it
775       under the terms of either: the GNU General Public License as published
776       by the Free Software Foundation; or the Artistic License.
777
778       See http://dev.perl.org/licenses/ for more information.
779
780
781
782perl v5.32.1                      2021-01-26                           CRSH(1)
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