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Full Discussion: Time out set in perl script
Top Forums Shell Programming and Scripting Time out set in perl script Post 302954780 by kumar85shiv on Friday 11th of September 2015 01:53:07 AM
Old 09-11-2015
Time out set in perl script
Hi,

I am preparing a perl script, which will run some commads on remote Linux servers.

I have a file contains all the servers names one by one like below

vi servers.txt

srv1
srv2
srv3

Now, I need to prepare a perl script to ssh (or)rsh to each server in the above file and get the uptime.

but the issue is, if the server is pinging and not able to ssh or rsh, then the script is getting hung.

can anyone suggested me to fix this, without using any perl modules.

here is my script

Code:
 
 #!/usr/bin/perl 
 use strict;use warnings;
  
 open (DATA, "<servers.txt") or die "no file, $!";
@srv = <DATA>;
close (DATA);
  
 $cmd = 'uptime';

 foreach $i (@srv) {
        chomp $i;
         $up = qx/rsh $i '$cmd';
         print " $i $up";
          }
 exit(0);

here the problem is, if the server is pinging but not able to login, then the script is not moving to another server.

please suggest me.
 

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LEARN ABOUT CENTOS

ipa-csreplica-manage

ipa-csreplica-manage(1) 					 IPA Manual Pages					   ipa-csreplica-manage(1)

NAME

       ipa-csreplica-manage - Manage an IPA CS replica

SYNOPSIS

       ipa-csreplica-manage [OPTION]...  [connect|disconnect|del|list|re-initialize|force-sync]

DESCRIPTION

       Manages the CA replication agreements of an IPA server.

       connect [SERVER_A] <SERVER_B>
	      - Adds a new replication agreement between SERVER_A/localhost and SERVER_B

       disconnect [SERVER_A] <SERVER_B>
	      - Removes a replication agreement between SERVER_A/localhost and SERVER_B

       del <SERVER>
	      - Removes all replication agreements and data about SERVER

       list [SERVER]
	      - Lists all the servers or the list of agreements of SERVER

       re-initialize
	      - Forces a full re-initialization of the IPA CA server retrieving data from the server specified with the --from option

       force-sync
	      - Immediately flush any data to be replicated from a server specified with the --from option

       The  connect  and  disconnect  options are used to manage the replication topology. When a replica is created it is only connected with the
       master that created it. The connect option may be used to connect it to other existing replicas.

       The disconnect option cannot be used to remove the last link of a replica. To remove a replica from the topology use the del option.

       If a replica is deleted and then re-added within a short time-frame then the 389-ds instance on	the  master  that  created  it	should	be
       restarted before re-installing the replica. The master will have the old service principals cached which will cause replication to fail.

OPTIONS

       -H HOST, --host=HOST
	      The IPA server to manage.  The default is the machine on which the command is run Not honoured by the re-initialize command.

       -p DM_PASSWORD, --password=DM_PASSWORD
	      The Directory Manager password to use for authentication

       -v, --verbose
	      Provide additional information

       -f, --force
	      Ignore some types of errors

       --from=SERVER
	      The server to pull the data from, used by the re-initialize and force-sync commands.

EXAMPLES

       List a server's replication agreements.
	       # ipa-csreplica-manage list srv1.example.com
	       srv2.example.com
	       srv3.example.com

       Re-initialize a replica:
	       # ipa-csreplica-manage re-initialize --from srv2.example.com

	      This will re-initialize the data on the server where you execute the command, retrieving the data from the srv2.example.com replica

       Add a new replication agreement:
	       # ipa-csreplica-manage connect srv2.example.com srv4.example.com

       Remove an existing replication agreement:
	       # ipa-csreplica-manage disconnect srv1.example.com srv3.example.com

       Completely remove a replica:
	       # ipa-csreplica-manage del srv4.example.com

       Using connect/disconnect you can manage the replication topology.

EXIT STATUS

       0 if the command was successful

       1 if an error occurred

IPA
								    Jul 14 2011 					   ipa-csreplica-manage(1)
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