invoking commands on Unix from Windows power shell - powershell

Is this possible ?, someone has suggested that I migth be able to do via ssh, essentially run a command on Unix pipe the output to a file get it back and then perform some action in the invoking Power Shell script.

Well, you can use tools like plink to execute a command via ssh on a remote server. Also you don't need to write the result to a file; you can simply assign it to a variable:
$output = plink ...

With Win32-OpenSSH you can execute commands over SSH. See Win32-OpenSSH Examples.

It is possible!
Have a look at this GitHub repository for all of the UNIX commands that have been compiled to run on Windows. Then, you can run both PowerShell and UNIX commands from PowerShell.

Related

Send command to Putty (Windows) [duplicate]

I have a scenario where I need to run a linux shell command frequently (with different filenames) from windows. I am using PuTTY and WinSCP to do that (requires login name and password). The file is copied to a predefined folder in the linux machine through WinSCP and then the command is run from PuTTY. Is there a way by which I can automate this through a program. Ideally I would like to right click the file from windows and issue the command which would copy the file to remote machine and run the predefined command (in PuTTy) with the filename as argument.
Putty usually comes with the "plink" utility.
This is essentially the "ssh" command line command implemented as a windows .exe.
It pretty well documented in the putty manual under "Using the command line tool plink".
You just need to wrap a command like:
plink root#myserver /etc/backups/do-backup.sh
in a .bat script.
You can also use common shell constructs, like semicolons to execute multiple commands. e.g:
plink read#myhost ls -lrt /home/read/files;/etc/backups/do-backup.sh
There could be security issues with common methods for auto-login.
One of the most easiest ways is documented below:
Running Putty from the Windows Command Line
And as for the part the executes the command
In putty UI, Connection>SSH> there's a field for remote command.
4.17 The SSH panel
The SSH panel allows you to configure
options that only apply to SSH
sessions.
4.17.1 Executing a specific command on the server
In SSH, you don't have to run a
general shell session on the server.
Instead, you can choose to run a
single specific command (such as a
mail user agent, for example). If you
want to do this, enter the command in
the "Remote command" box.
http://the.earth.li/~sgtatham/putty/0.53/htmldoc/Chapter4.html
in short, your answers might just as well be similar to the text below:
let Putty run command in remote server
You can write a TCL script and establish SSH session to that Linux machine and issue commands automatically. Check http://wiki.tcl.tk/11542 for a short tutorial.
You can create a putty session, and auto load the script on the server, when starting the session:
putty -load "sessionName"
At remote command, point to the remote script.
You can do both tasks (the upload and the command execution) using WinSCP. Use WinSCP script like:
option batch abort
option confirm off
open your_session
put %1%
call script.sh
exit
Reference for the call command:
https://winscp.net/eng/docs/scriptcommand_call
Reference for the %1% syntax:
https://winscp.net/eng/docs/scripting#syntax
You can then run the script like:
winscp.exe /console /script=script_path\upload.txt /parameter file_to_upload.dat
Actually, you can put a shortcut to the above command to the Windows Explorer's Send To menu, so that you can then just right-click any file and go to the Send To > Upload using WinSCP and Execute Remote Command (=name of the shortcut).
For that, go to the folder %USERPROFILE%\SendTo and create a shortcut with the following target:
winscp_path\winscp.exe /console /script=script_path\upload.txt /parameter %1
See Creating entry in Explorer's "Send To" menu.
Here is a totally out of the box solution.
Install AutoHotKey (ahk)
Map the script to a key (e.g. F9)
In the ahk script,
a) Ftp the commands (.ksh) file to the linux machine
b) Use plink like below. Plink should be installed if you have putty.
plink sessionname -l username -pw password test.ksh
or
plink -ssh example.com -l username -pw password test.ksh
All the steps will be performed in sequence whenever you press F9 in windows.
Code:
using System;
using System.Diagnostics;
namespace playSound
{
class Program
{
public static void Main(string[] args)
{
Console.WriteLine(args[0]);
Process amixerMediaProcess = new Process();
amixerMediaProcess.StartInfo.CreateNoWindow = false;
amixerMediaProcess.StartInfo.UseShellExecute = false;
amixerMediaProcess.StartInfo.ErrorDialog = false;
amixerMediaProcess.StartInfo.RedirectStandardOutput = false;
amixerMediaProcess.StartInfo.RedirectStandardInput = false;
amixerMediaProcess.StartInfo.RedirectStandardError = false;
amixerMediaProcess.EnableRaisingEvents = true;
amixerMediaProcess.StartInfo.Arguments = string.Format("{0}","-ssh username#"+args[0]+" -pw password -m commands.txt");
amixerMediaProcess.StartInfo.FileName = "plink.exe";
amixerMediaProcess.Start();
Console.Write("Presskey to continue . . . ");
Console.ReadKey(true);
}
}
}
Sample commands.txt:
ps
Link: https://huseyincakir.wordpress.com/2015/08/27/send-commands-to-a-remote-device-over-puttyssh-putty-send-command-from-command-line/
Try MtPutty,
you can automate the ssh login in it. Its a great tool especially if you need to login to multiple servers many times. Try it here
Another tool worth trying is TeraTerm. Its really easy to use for the ssh automation stuff. You can get it here. But my favorite one is always MtPutty.
In case you are using Key based authentication, using saved Putty session seems to work great, for example to run a shell script on a remote server(In my case an ec2).Saved configuration will take care of authentication.
C:\Users> plink saved_putty_session_name path_to_shell_file/filename.sh
Please remember if you save your session with name like(user#hostname), this command would not work as it will be treated as part of the remote command.

Perl script to create a SSH session to a remote machine using Putty and execute commands from a Windows machine

I want to create an SSH session to a remote machine using Perl, and execute commands automatically from a Windows machine. Is there a way I can do that?
The Net::SSH module relies on a command-line ssh tool, which Windows doesn't have straight from the box.
I suggest you use Putty's plink command instead of putty itself, as plink is much closer to an ssh command-line utility and is intended for this sort of thing. Together with IPC::Open3 (or IPC::Open2 if you're not interested in seeing the output to STDERR) it will let you print commands and and readline the responses interactively. I am sure you can create your own log files.
Alternatively you could consider Net::SSH::W32Perl, which is a compatibility layer around Net::SSH::Perl. It is rather old but should be better than relying on Putty.

Run a perl script inside another script using ssh

I have a perl script where I need to connect to another machine using ssh and there run another perl script. I tried using this line:
system("ssh $admin_server 'perl /Perl/scripts/capture_server_restarts_gse.pl $month $date'");
But everytime the script gets to that line, I get the prompt for the remote machine and the script doesn't run.
How can I fix this so the script runs automatically on the other machine without showing the prompt.
Note: I don't need the password and user to connect to the remote machine we already solved that.
Why not copy your public key onto the other machine ? That way you'll be pre-authorised.
Here are the instructions on how to do this using ssh-keygen
Otherwise you have to feed ssh with your password, and that's tricky since ssh normally takes input from a tty and you have to configure your script with the password.
The SSH server may be configured to run always some custom shell instead of the command passed from the client.
Try just running some simple command from the command line, i.e.:
ssh server ls
A less likely possibility is that the perl variables interpolated into the system argument could contain some shell metacharacters requiring better escaping. For instance, a semicolon inside $admin_server.

Run a perl script on remote machine from local machine using Telnet or SSH with Perl

I want to run a Perl script in a remote machine using telnet or ssh. The script is on my local host.how can do this. Can anyone please help me on this?
If you for some reason don't want to copy the script to the remote host and then run it, you can send the script to the Perl interpreter over stdin. If perl doesn't get either a script name of a script on the command line it tries to read the script on stdin. So this would work:
ssh user#remote perl < my_script.pl
Of course this requires that all necessary modules are already installed on the remote host. If you script only have pure perl dependencies you can work around this restriction by using App::FatPacker to make your script (more) self contained.
But if this is an recurring task I would recommend getting the script deployed correctly to your remote host.
scp your script to remote machine.
ssh user#remote 'perl /path/to/remote/script.pl'
Using HERE document across SSH might also do the trick you are after. You can run at least a BASH script without first separately copying it to remote. I have not verified anything else than BASH but no reason to doubt either. Please see:
ssh + here document + interactive mode

How to open ssh session and execute commands from a Perl script?

I have a Perl script running on a Windows machine. I need this script to open a ssh session to a remote Unix machine, and to be able to execute certain commands on that Unix machine and to be able to get the output returned from these commands.
These commands are generated during the run-time of the script, and there are many of them executed at different times.
How can I do it?
Approach 1: Use CYGWIN: http://perlwin32ssh.blogspot.com/2007/07/test_4418.html
Approach 2: Use Net::SSH::W32Perl module.
This is one thread discussing how to install it: http://code.activestate.com/lists/perl-win32-users/29180/ (It seems to require downloading custom version of the module)
This thread should help with the problems arising from dependencies on math libraries needed for ssh calculations: http://www.issociate.de/board/post/494356/I%27m_trying_to_install_%27Net::SSH::Perl%27_on_a_Windows_Box..html
Caveat emptor: I never installed this, the above is just result of some analysis of google results.
#!/usr/bin/perl
system("ssh foo 'ls -l'");
Or go through the hassle of using ptmx(4) on the local side and ssh -t for remote.