3

After alot of google searching, I see it is possible to send a message from a Ubuntu computer to Windows XP computer with the follow smbclient code.

echo "hello world" | smbclient -M "WindowsHost" . Sends message and shows Windows Meesage Popup

However I haven't found a single person running Windows 7 or 8 that is able to send a message from Ubuntu or ANY OTHER distribution. I would think that it work work fine because Windows new message utility is MSG, which works if you send a message from Windows computer to Windows computer.

So why won't

echo "hello world" | smbclient -M "WindowsHost" send a popup message to Window Computer?

Alternative to smbclient to send message to Window 7 or 8 computer?

4

According to this:

Windows Vista, Windows 7, and Windows 8 have no Netsend command at all, and you need additional software to receive or send net messages, like our LanTalk NET.

So... no more smbclient to send a message to Windows Vista and higher.


According to this, Windows 7 does have the MSG.EXE-command but i haven't figured out if you can send a message from a Linux-based machine to Windows 7.

C:\>msg rik hello world
gives me the dialog below so the mechanism is still there.
Now we need to find a way to do it from Linux.

enter image description here

But it is certain that smbclient is not compatible with msg.exe.

You could try to Google for a Linux version


Edit:

I did some searching and couldn't find any Linux-programs which can communicate with the standard MSG.EXE-service of Windows. Due to the many exploits of the net send-command by hackers and spammers Microsoft retired the service (as of Vista) and the new MSG.EXE communications are encrypted.

Next idea is to execute the MSG.EXE-command remotely on a Windows machine. This should be doable with the PsExec-service.

First i tried to use PsExec from Windows XP to Windows 7 (just to be sure PsExec worked).
But i got an "access denied"-error. From here i followed the first suggestion and the registry change on the target Windows 7 worked:
(i also needed to do this on a clean Windows 8.1 machine i tested with as target)

reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\system /v LocalAccountTokenFilterPolicy /t REG_DWORD /d 1 /f

(If "Windows (PsExec) -> Windows" doesn't work "Linux (winexe) -> Windows" certainly wouldn't work.)

Next i installed winexe on my ancient Fedora 3 server from 2004. (Yeah... i know ;).
I got a lot of warnings during compilation but non were fatal.

wget http://downloads.sourceforge.net/project/winexe/winexe-1.00.tar.gz
tar xzvf winexe-1.00.tar.gz
cd winexe-1.00/source4/
./autogen.sh
./configure
make

bin/winexe -U user%password //xps8500 'cmd'
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Windows\system32>

I got the command-prompt from the remote system.

Next the command:

bin/winexe -U user%password //xps8500 'msg rik hello world'

and i got the same image as above. So that works. It's not very pretty to use PsExec/winexe to execute MSG.EXE, but hey... it works ;)

(just test every system you need if they can be used as target for PsExec or can receive a MSG.EXE-message with /server:x from another Windows machine you PsExec to)

Personally i don't like a dialog popping up during my work (blocking everything i type), so i use a small less intrusive messaging system, which pops out a small window near the system tray (which disappears after a timeout) but that requires additional software. There are a lot of simple messaging programs you could use. You could also code your own. It doesn't have to be fancy to just show a popup in the right-bottom corner.

| improve this answer | |
  • Hey Rik, I found this way: askubuntu.com/questions/335026/… – Benjamin Jones Jan 8 '14 at 22:07
  • Yeah i was just about to add this link. Using a psexec-like command to run the msg.exe on the Windows machine seems like a long way around but would work ;) – Rik Jan 8 '14 at 22:10
  • 1
    Yup. That looks about right. (I'll try that tomorrow too, on my Linux-server). I will also Google some more for a more native (compatible) solution. – Rik Jan 8 '14 at 22:16
  • 1
    Added an Edit with my experience with winexe (Linux alternative to PsExec) – Rik Jan 9 '14 at 11:30
  • 1
    Yes. You can read about my experience with winexe (compilation and running it) in my edit (halfway my answer:). bin/winexe -U user%password //xps8500 'msg rik hello world' worked beautifully. – Rik Jan 9 '14 at 18:50

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