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Top Forums UNIX for Beginners Questions & Answers How to check via SSH and credentials if file on remote server exists? Post 303031847 by RudiC on Wednesday 6th of March 2019 12:43:05 PM
Old 03-06-2019
For that many files, an ssh connection for every single one is pointless unless they all are on different servers. Should they be on one or few servers, and you just need to check their existence, why not use the sftp command, which is part of the ssh suite, to get a remote directory listing and evaluate that locally? Like
Code:
sftp user@host <<< "ls -1 $DIRTOCHECK" > filesonserver

If there are more than one remote directories to be searched, try using a "batchfile" containing the ls commands for the target directories, like
Code:
sftp -b batchfile user@host  > filesonserver

After that, on the local node, you can compare the results against the list of necessary files.

Last edited by RudiC; 03-06-2019 at 03:24 PM..
 

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Net::OpenSSH::Compat::Perl(3pm) 			User Contributed Perl Documentation			   Net::OpenSSH::Compat::Perl(3pm)

NAME
Net::OpenSSH::Compat::Perl - Net::OpenSSH adapter for Net::SSH::Perl API compatibility SYNOPSIS
use Net::OpenSSH::Compat::Perl qw(:supplant); use Net::SSH::Perl; my $ssh = Net::SSH::Perl->new('host'); $ssh->login($user, $passwd); my ($out, $err, $rc) = $ssh->cmd($cmd); DESCRIPTION
This module implements a subset of Net::SSH::Perl API on top of Net::OpenSSH. After the module is loaded as... use Net::OpenSSH::Compat::Perl qw(:supplant); ... it supplants the Net::SSH::Perl module as if it were installed on the machine using Net::OpenSSH under the hood to handle SSH operations. Setting defaults The hash %Net::OpenSSH::Compat::Perl::DEFAULTS can be used to set default values for Net::OpenSSH and other modules called under the hood and otherwise not accesible through the Net::SSH::Perl API. The entries currently supported are: connection => [ %opts ] Extra options passed to "Net::OpenSSH::new" constructor. Example: $Net::OpenSSH::Compat::SSH::Perl::DEFAULTS{connection} = [ ssh_path => "/opt/SSH/bin/ssh" ]; BUGS AND SUPPORT
This is a work in progress. "register_handler" method is not supported. Net::SSH::Perl submodules (i.e. Net::SSH::Perl::Channel) are not emulated. Anyway, if your Net::SSH::Perl script fails, fill a bug report at the CPAN RT bugtracker (https://rt.cpan.org/Ticket/Create.html?Queue=Net-OpenSSH-Compat <https://rt.cpan.org/Ticket/Create.html?Queue=Net-OpenSSH-Compat>) or just send me an e-mail with the details. Include at least: 1 - The full source of the script 2 - A description of what happens in your machine 3 - What you thing it should be happening 4 - What happens when you use the real Net::SSH::Perl 5 - The version and name of your operating system 6 - The version of the OpenSSH ssh client installed on your machine ("ssh -V") 7 - The Perl version ("perl -V") 8 - The versions of the Perl packages Net::OpenSSH, IO::Pty and this Net::OpenSSH::Compat. Git repository The source code repository is at https://github.com/salva/p5-Net-OpenSSH-Compat <https://github.com/salva/p5-Net-OpenSSH-Compat>. My wishlist If you like this module and you're feeling generous, take a look at my Amazon Wish List: <http://amzn.com/w/1WU1P6IR5QZ42> Also consider contributing to the OpenSSH project this module builds upon: <http://www.openssh.org/donations.html>. COPYRIGHT AND LICENSE
Copyright (C) 2011 by Salvador Fandin~o (sfandino@yahoo.com) This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.0 or, at your option, any later version of Perl 5 you may have available. perl v5.14.2 2012-02-24 Net::OpenSSH::Compat::Perl(3pm)
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