10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have write a script which contains
ssh -p 12345 dcplatform@10.125.42.50
ssh 127.0.0.1 -p 5555 "$CMD"
ssh root@$GUEST_IP "$CMD"
before I use public key, it works well, now I want to change to "expect", BUT I don't want to change above code and "parameter position"
I can post a... (1 Reply)
Discussion started by: yanglei_fage
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2. Shell Programming and Scripting
SSHing into a machine can take a few seconds, but after I'm in, the commands return quickly. I was wondering if the timeout setting can be changed once I'm logged into the machine. Does anyone know if this can be set on the fly? The problem here is, if I have to set timeout = 10, it'll take 10... (1 Reply)
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3. UNIX for Dummies Questions & Answers
I ran a job using SSH and then used screen command followed by space bar. Then I ran the job. But after some hours, the internet connection was lost.This had happened to me before. I used to run the whole job again. Today I came across the fact that I could restart the jobs without having to do it... (2 Replies)
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4. Shell Programming and Scripting
Hi there
I found the Command to send commands to other servers like:
sv01> ssh user@sv02 'ps -ef'
But I cant use Variables from a script i want to execute on another server like:
sv01> ssh user@sv02 'cd $SCRIPTHOME'
although the variable is set on sv01.
How can I run commands on sv02 with... (2 Replies)
Discussion started by: DarkSwiss
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5. Shell Programming and Scripting
I've struggled to find a solution to this problem from searching so I thought I'd write a post to see what can be done.
I'm attempting to connect and run commands on 'server2' but because of security limitations I cannot access it directly. I can however ssh into 'server1' and then into... (7 Replies)
Discussion started by: mcintosh.jamie
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6. HP-UX
Our network administrators implemented some sort of check to kill idle sessions and now burden is on us to run some sort of keep alive. Client based keep alive doesn't do a very good job. I have same issue with ssh. Does solution 2 provided above apply for ssh sessions also? (1 Reply)
Discussion started by: yoda9691
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7. Shell Programming and Scripting
Hey Everyone,
I have found this script online that has almost all the features I am looking for. However, I do not know enough expect to debug the problem.
http://linuxgazette.net/100/misc/tips/sshtool.expect.txt
First, it Traps out after it collects the user's password. I do not know... (0 Replies)
Discussion started by: patchsmyle
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8. Shell Programming and Scripting
Hi,
I'm trying to make an SSH into a SGSN node and collect some commands printouts.:confused:
I really don't know how this can be done.
I think it must be like this:
#!/bin/bash
ssh user@192.168.88.10
Then I must enter the password, but I don't know how to do it, I tried with:
echo... (3 Replies)
Discussion started by: nagomes
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9. Shell Programming and Scripting
I know the root login/password for a machines, and I want to automate some commands like this from each:
ssh root@remoteHost1 "tail /var/log/messages"
ssh root@remoteHost2 "tail /var/log/messages"
ssh root@remoteHost3 "tail /var/log/messages"
ssh root@remoteHost4 "tail /var/log/messages"
ssh... (2 Replies)
Discussion started by: jjinno
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10. UNIX for Dummies Questions & Answers
i have a home network in which one computer can be sshed into from the internet. inside this ssh session, i cannot ssh into another computer on the internal network (LAN)
i get the following error:
pseudo-terminal will not be alocated because stdin is not a terminal
any suggestions would be... (4 Replies)
Discussion started by: noamkrief
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SSH(3pm) User Contributed Perl Documentation SSH(3pm)
NAME
Net::SSH - Perl extension for secure shell
SYNOPSIS
use Net::SSH qw(ssh issh sshopen2 sshopen3);
ssh('user@hostname', $command);
issh('user@hostname', $command);
ssh_cmd('user@hostname', $command);
ssh_cmd( {
user => 'user',
host => 'host.name',
command => 'command',
args => [ '-arg1', '-arg2' ],
stdin_string => "string
",
} );
sshopen2('user@hostname', $reader, $writer, $command);
sshopen3('user@hostname', $writer, $reader, $error, $command);
DESCRIPTION
Simple wrappers around ssh commands.
For an all-perl implementation that does not require the system ssh command, see Net::SSH::Perl instead.
SUBROUTINES
ssh [USER@]HOST, COMMAND [, ARGS ... ]
Calls ssh in batch mode.
issh [USER@]HOST, COMMAND [, ARGS ... ]
Prints the ssh command to be executed, waits for the user to confirm, and (optionally) executes the command.
ssh_cmd [USER@]HOST, COMMAND [, ARGS ... ]
ssh_cmd OPTIONS_HASHREF
Calls ssh in batch mode. Throws a fatal error if data occurs on the command's STDERR. Returns any data from the command's STDOUT.
If using the hashref-style of passing arguments, possible keys are:
user (optional)
host (requried)
command (required)
args (optional, arrayref)
stdin_string (optional) - written to the command's STDIN
sshopen2 [USER@]HOST, READER, WRITER, COMMAND [, ARGS ... ]
Connects the supplied filehandles to the ssh process (in batch mode).
sshopen3 HOST, WRITER, READER, ERROR, COMMAND [, ARGS ... ]
Connects the supplied filehandles to the ssh process (in batch mode).
EXAMPLE
use Net::SSH qw(sshopen2);
use strict;
my $user = "username";
my $host = "hostname";
my $cmd = "command";
sshopen2("$user@$host", *READER, *WRITER, "$cmd") || die "ssh: $!";
while (<READER>) {
chomp();
print "$_
";
}
close(READER);
close(WRITER);
FREQUENTLY ASKED QUESTIONS
Q: How do you supply a password to connect with ssh within a perl script using the Net::SSH module?
A: You don't (at least not with this module). Use RSA or DSA keys. See the
quick help in the next section and the ssh-keygen(1) manpage.
A #2: See Net::SSH::Expect instead.
Q: My script is "leaking" ssh processes.
A: See "How do I avoid zombies on a Unix system" in perlfaq8, IPC::Open2, IPC::Open3 and "waitpid" in perlfunc.
GENERATING AND USING SSH KEYS
1 Generate keys
Type:
ssh-keygen -t rsa
And do not enter a passphrase unless you wanted to be prompted for one during file copying.
Here is what you will see:
$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/User/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/User/.ssh/id_rsa.
Your public key has been saved in /home/User/.ssh/id_rsa.pub.
The key fingerprint is:
5a:cd:2b:0a:cd:d9:15:85:26:79:40:0c:55:2a:f4:23 User@JEFF-CPU
2 Copy public to machines you want to upload to
"id_rsa.pub" is your public key. Copy it to "~/.ssh" on target machine.
Put a copy of the public key file on each machine you want to log into. Name the copy "authorized_keys" (some implementations name
this file "authorized_keys2")
Then type:
chmod 600 authorized_keys
Then make sure your home dir on the remote machine is not group or world writeable.
AUTHORS
Ivan Kohler <ivan-netssh_pod@420.am>
Assistance wanted - this module could really use a maintainer with enough time to at least review and apply more patches. Or the module
should just be deprecated in favor of Net::SSH::Expect or made into an ::Any style compatibility wrapper that uses whatver implementation
is avaialble (Net::SSH2, Net::SSH::Perl or shelling out like the module does now). Please email Ivan if you are interested in helping.
John Harrison <japh@in-ta.net> contributed an example for the documentation.
Martin Langhoff <martin@cwa.co.nz> contributed the ssh_cmd command, and Jeff Finucane <jeff@cmh.net> updated it and took care of the 0.04
release.
Anthony Awtrey <tony@awtrey.com> contributed a fix for those still using OpenSSH v1.
Thanks to terrence brannon <tbone@directsynergy.com> for the documentation in the GENERATING AND USING SSH KEYS section.
COPYRIGHT
Copyright (c) 2004 Ivan Kohler. Copyright (c) 2007-2008 Freeside Internet Services, Inc. All rights reserved. This program is free
software; you can redistribute it and/or modify it under the same terms as Perl itself.
BUGS
Not OO.
Look at IPC::Session (also fsh, well now the native SSH "master mode" stuff)
SEE ALSO
For a perl implementation that does not require the system ssh command, see Net::SSH::Perl instead.
For a wrapper version that allows you to use passwords, see Net::SSH::Expect instead.
For another non-forking version that uses the libssh2 library, see Net::SSH2.
For a way to execute remote Perl code over an ssh connection see IPC::PerlSSH.
ssh-keygen(1), ssh(1), IO::File, IPC::Open2, IPC::Open3
perl v5.10.0 2008-05-14 SSH(3pm)