Is there any global command in UNIX? Post: 302483088

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Top Forums UNIX for Dummies Questions & Answers Is there any global command in UNIX? Post 302483088 by purdym on Thursday 23rd of December 2010 03:05:31 PM

12-23-2010

Registered User

Hi siavash,

the idea behind the script was to replicate what dsh does AIX on all my servers.

The script is nothing special. It's just a loop around ssh. However simpler, it is also very powerful.

Here is how it works:

Code:

gdsh
   Usage: [[-s working_col_file|OS_name] | -w nodename{,nodename}] -c command

   Optional Parameters:
         [-d] [-h] [-n] [-T] [-v]

   Where:
         -C
            Collapses output. Used with dshbak.
         -c specifies the command to run
            Required.
         -d
            Debug mode.
         -h
            Prints this help screen.
         -n
            No Parallel mode. By default the command is run on every node at the same time.
         -s
            Specify a working collective file OR specify an OS name. Use uname -s to specify
             a working collective file with that postfix. ie. /.gwcoll.AIX.
         -T
            Testing mode. NO actual work will be done.
         -v
            Verbose mode.
         -w nodename{,nodename}
            Default: ALL nodes

   Notes:
         One of -s or -w is required.
         Piping the output to dshbak -c will group like results together.
         Use -C with dshbak, or you will get no output.

   Example execution statements:
         gdsh -s /.gwcoll.AIX -c date
         gdsh -s AIX -c date
         gdsh -C -s AIX -c date | dshbak -c
         gdsh -s all.Linux_HP-UX -c date
         gdsh -C -w n,005 -c "date" | dshbak -c

Here's a real example (I did change the host names):

Code:

gdsh -C -c "uname -s" | dshbak -c
HOSTS -------------------------------------------------------------------------
d, iq, m, p, r, t, z
-------------------------------------------------------------------------------
AIX


HOSTS -------------------------------------------------------------------------
001, 002, 003, u04, 005, 006, 007, 010, 011
-------------------------------------------------------------------------------
HP-UX


HOSTS -------------------------------------------------------------------------
101
-------------------------------------------------------------------------------
Linux

In order to make this work I had to setup a separate physical network.
I then run a second SSH daemon.
I had to do those two things because I have different security on this interface and a different ssh configuration.

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LEARN ABOUT NETBSD

intro

INTRO(1)						    BSD General Commands Manual 						  INTRO(1)

NAME

     intro -- introduction to general commands (tools and utilities)

DESCRIPTION

     Section one of the manual contains most of the commands which comprise the BSD user environment.  Some of the commands included in section
     one are text editors, command shell interpreters, searching and sorting tools, file manipulation commands, system status commands, remote
     file copy commands, mail commands, compilers and compiler tools, formatted output tools, and line printer commands.

     All commands set a status value upon exit which may be tested to see if the command completed normally.  The exit values and their meanings
     are explained in the individual manuals.  Traditionally, the value 0 signifies successful completion of the command.

SEE ALSO

     man(1), intro(2), intro(3), intro(4), intro(5), intro(6), intro(7), intro(8), intro(9)

     The Regents of the University of California, UNIX User's Manual Supplementary Documents, University of California, Berkeley,
     http://www.netbsd.org/docs/bsd/lite2/usd.html, June, 1993.

HISTORY

     An intro(1) manual appeared in Version 6 AT&T UNIX.

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								    May 5, 2010 							       BSD