Run netstat -ano and look at the PID that it is under.

If you add the &#39;-o&#39; option, you&#39;ll see the PID values, and likely it will be PID 4, which is the System PID. This means it is probably a Service. (Note that Windows 7 will report &quot;PID 4&quot;, while Windows XP will report &quot;System&quot;).

This link gives some ideas of what it might be: https://superuser.com/questions/43307/whys-is-system-process-listening-on-port-80?rq=1



It&#39;s probably NETBIOS, if the port used is 137, 138, or 139. On my Win7 system, disabling NETBIOS on all my network adapters from the Network and Sharing Center made the connections disappear from netstat.

I&#39;m posting this as a new answer because the other questions linked above are protected, and I can&#39;t reply to those answers as a guest. Hopefully this will help people like me who stumble onto this question.

Just went through this lately, just to add to the answers already.  Running a .NET webserver, it often happens with incoming web connections.  They seem to get PID 0 (System Idle) which is just a holding place for connections.  It says &quot;Can not obtain ownership information&quot; for these.

Good description of why its on PID 0, https://stackoverflow.com/questions/22802847/tcp-connection-owned-by-pid-zero



How can I make it so that when the contents of a text field changes, a function is called?


UITextField Value Changed Event?

I have been trying to understand the exact meaning/purpose of loading php as an apache module vs the rest.

When php is installed as an apache module, what exactly happens? For example, does reading the php-ini file happen every time the php request comes or when the php module is loaded alone?

mod_php vs cgi vs fast-cgi

(Windows 7 x86)

If I run `netstat -ab`, I get a list of active connections, along with the names of the applications which have opened the connections.

However, some connections (including the one opened by my app) are listed as:

&gt; Can not obtain ownership information

Why?

Thanks,

Darren.

What does &quot;Can not obtain ownership information&quot; in Netstat -ab mean?

(Windows 7 x86)
If I run <code>netstat -ab</code>, I get a list of active connections, along with the names of the applications which have opened the connections.
However, some connections (including the one opened by my app) are listed as:
> Can not obtain ownership information
Why?
Thanks,
Darren.

I am writing an HTTP server in C#.

When I try to execute the function `HttpListener.Start()` I get an `HttpListenerException` saying 

&gt; &quot;Access Denied&quot;.

When I run the app in admin mode in windows 7 it works fine.

Can I make it run without admin mode? if yes how?
If not how can I make the app change to admin mode after start running?


    using System;
    using System.Net;
    
    namespace ConsoleApplication1
    {
        class Program
        {
            private HttpListener httpListener = null;
    
            static void Main(string[] args)
            {
                Program p = new Program();
                p.Server();
            }
    
            public void Server()
            {
                this.httpListener = new HttpListener();
    
                if (httpListener.IsListening)
                    throw new InvalidOperationException(&quot;Server is currently running.&quot;);
    
                httpListener.Prefixes.Clear();
                httpListener.Prefixes.Add(&quot;http://*:4444/&quot;);
    
                try
                {
                    httpListener.Start(); //Throws Exception
                }
                catch (HttpListenerException ex)
                {
                    if (ex.Message.Contains(&quot;Access is denied&quot;))
                    {
                        return;
                    }
                    else
                    {
                        throw;
                    }
                }
            }
        }
    }



HttpListener Access Denied

I have a batch file that executes three Maven commands, one after the other. Each command can be successfully executed in the script - by itself!. But when I add all three commands to the same file, only the first one executes before the script exits. Any idea why?

    mvn install:install-file -DgroupId=gdata -DartifactId=base -Dversion=1.0 -Dfile=gdata-base-1.0.jar  -Dpackaging=jar -DgeneratePom=true
    mvn install:install-file -DgroupId=gdata -DartifactId=blogger -Dversion=2.0 -Dfile=gdata-blogger-2.0.jar  -Dpackaging=jar -DgeneratePom=true
    mvn install:install-file -DgroupId=gdata -DartifactId=blogger-meta -Dversion=2.0 -Dfile=gdata-blogger-meta-2.0.jar  -Dpackaging=jar -DgeneratePom=true

Also, if I copy all three commands and paste them into a command shell (cmd.exe), they execute one after the other with no problem. So this is apparently some issue with the dos batch file.



Why does only the first line of this Windows batch file execute but all three lines execute in a command shell?

I am currently trying to get CMake to run on my Windows 7 (64-bit) system. I want to compile [TagLib][1] for later use with a Qt application I am working on. I would like to compile it with MinGW (not Visual C++ as in [this other question][2]).

I download the installer (cmake-2.8.3-win32-x86.exe) and install it (I also opt to add CMake to my path). I then go to the directory why the CMakeLists.txt file is and run `cmake .`. It then gives me this giant error.


    C:\Users\Joel\Downloads\taglib-1.6.3&gt;cmake .
    CMake Warning at CMakeLists.txt:1 (project):
      To use the NMake generator, cmake must be run from a shell that can use the
      compiler cl from the command line.  This environment does not contain
      INCLUDE, LIB, or LIBPATH, and these must be set for the cl compiler to
      work.
    
    
    -- The C compiler identification is unknown
    -- The CXX compiler identification is unknown
    CMake Warning at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/Platform/Windows-cl.cmake:
    28 (ENABLE_LANGUAGE):
      To use the NMake generator, cmake must be run from a shell that can use the
      compiler cl from the command line.  This environment does not contain
      INCLUDE, LIB, or LIBPATH, and these must be set for the cl compiler to
      work.
    Call Stack (most recent call first):
      C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/CMakeCInformation.cmake:60 (INCLUDE)
      CMakeLists.txt:1 (project)
    
    
    CMake Error: your RC compiler: &quot;CMAKE_RC_COMPILER-NOTFOUND&quot; was not found.   Please set CMAKE_RC_COM
    PILER to a valid compiler path or name.
    -- Check for CL compiler version
    -- Check for CL compiler version - failed
    -- Check if this is a free VC compiler
    -- Check if this is a free VC compiler - yes
    -- Using FREE VC TOOLS, NO DEBUG available
    -- Check for working C compiler: cl
    CMake Warning at CMakeLists.txt:2 (PROJECT):
      To use the NMake generator, cmake must be run from a shell that can use the
      compiler cl from the command line.  This environment does not contain
      INCLUDE, LIB, or LIBPATH, and these must be set for the cl compiler to
      work.
    
    
    CMake Warning at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/Platform/Windows-cl.cmake:
    28 (ENABLE_LANGUAGE):
      To use the NMake generator, cmake must be run from a shell that can use the
      compiler cl from the command line.  This environment does not contain
      INCLUDE, LIB, or LIBPATH, and these must be set for the cl compiler to
      work.
    Call Stack (most recent call first):
      C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/CMakeCInformation.cmake:60 (INCLUDE)
      CMakeLists.txt:2 (PROJECT)
    
    
    CMake Error at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/CMakeRCInformation.cmake:22
    (GET_FILENAME_COMPONENT):
      get_filename_component called with incorrect number of arguments
    Call Stack (most recent call first):
      C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/Platform/Windows-cl.cmake:28 (ENABLE_LANG
    UAGE)
      C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/CMakeCInformation.cmake:60 (INCLUDE)
      CMakeLists.txt:2 (PROJECT)
    
    
    CMake Error: CMAKE_RC_COMPILER not set, after EnableLanguage
    CMake Error: your C compiler: &quot;cl&quot; was not found.   Please set CMAKE_C_COMPILER to a valid compiler
    path or name.
    CMake Error: Internal CMake error, TryCompile configure of cmake failed
    -- Check for working C compiler: cl -- broken
    CMake Error at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake:52
    (MESSAGE):
      The C compiler &quot;cl&quot; is not able to compile a simple test program.
    
      It fails with the following output:
    
    
    
    
    
      CMake will not be able to correctly generate this project.
    Call Stack (most recent call first):
      CMakeLists.txt:1 (project)
    
    
    CMake Error: your C compiler: &quot;cl&quot; was not found.   Please set CMAKE_C_COMPILER to a valid compiler
    path or name.
    CMake Error: your CXX compiler: &quot;cl&quot; was not found.   Please set CMAKE_CXX_COMPILER to a valid compi
    ler path or name.
    -- Configuring incomplete, errors occurred!
    
    C:\Users\Joel\Downloads\taglib-1.6.3&gt;

I was kind of surprised that it failed so hard out of the box, considering it advertises itself as a cross-platform make.

I tried setting INCLUDE, LIB, and LIBPATH (Windows environment variables) all to my MinGW binaries directory (C:\MinGW\bin) but it&#39;s still giving me the same error. I also tried setting CMAKE_C_COMPILER and CMAKE_CXX_COMPILER to the location of g++ (C:\MinGW\bin\g++).

Does anyone know what&#39;s going on here?

**SOLUTION:**

Per tibur&#39;s suggestion, I ran the cmake GUI to create the make files.
I then went into the directory taglib directory and ran `mingw32-make.exe` to do the actual build.

  [1]: http://developer.kde.org/~wheeler/taglib.html
  [2]: https://stackoverflow.com/questions/2709108/cmake-doesnt-work-in-windows-xp

Running CMake on Windows

I&#39;m using Visual Studio 2010 and Windows 7 x64

The command prompt closes after exit, even though I used &quot;Start without debug&quot;. Is there a setting somewhere that I can use?

How to stop console from closing on exit?

I am trying to setup my TFS2010 Build and I want to access the files that are downloaded via the &quot;Version control path to custom assemblies&quot;.

From what I can tell those files are downloaded to:

`C:\User\&lt;Build User&gt;\AppData\Local\BuildAgent\&lt;Built Agent Number&gt;`

I can directly access that folder via the above path, but it would be nice if there was an environment variable (or something I can use in the build) to access that folder indirectly.

Or... Is there a better way to get at these files?  (I am putting a version file in there to be downloaded every time the build is run).



Environment Variable for AppData\Local / Access Downloaded custom assemblies

On Linux, I can use `netstat -pntl | grep $PORT` or `fuser -n tcp $PORT` to find out which process (PID) is listening on the specified TCP port. How do I get the same information on Mac OS X?

Who is listening on a given TCP port on Mac OS X?

I need to retrieve the default gateway on a Mac machine. I know that in Linux route -n will give an output from which I can easily retrieve this information. However this is not working in Mac OSX(Snow Leopard). 

I also tried `netstat -nr | grep &#39;default&#39;`, but I was hoping for a cleaner output like that produced by `route -n` in Linux/Unix. `netstat -nr` lists all the interfaces and the default gateway for them.

Any kind of suggestion or a hint in the right direction will be appreciated.

How to get default gateway in Mac OSX

I am unable to start GlassFish, because it keeps showing this error message:

    SEVERE: Shutting down v3 due to startup exception : No free port within range: 8080=com.sun.enterprise.v3.services.impl.monitor.MonitorableSelectorHandler@ed7d1

How can I find what applications are using what ports on Windows&amp;nbsp;Vista?
I have tried using nmap zenmap using the following target:

http://127.0.0.1:8080

But all I get is this:

    Starting Nmap 5.51 ( http://nmap.org ) at 2011-08-05 12:05 Central Daylight Time

    NSE: Loaded 57 scripts for scanning.

    Read data files from: C:\Program Files\Nmap
    Nmap done: 0 IP addresses (0 hosts up) scanned in 4.55 seconds
               Raw packets sent: 0 (0B) | Rcvd: 0 (0B)
    WARNING: No targets were specified, so 0 hosts scanned.


How do I find which application is using up my port?

Update: Already fixed, it seems that one of VirtualHosts configurations files was wrong in sites-enabled.

I have Ubuntu 11.10

When I run the command to start apache2:

    sudo /etc/init.d/apache2 start

I get the following error message:

&gt;  Starting web server apache2                                        
&gt; apache2: Could not reliably determine the server&#39;s fully qualified
&gt; domain name, using 127.0.1.1 for ServerName (98)Address already in
&gt; use: make_sock: could not bind to address 0.0.0.0:80 no listening
&gt; sockets available, shutting down Unable to open logs Action &#39;start&#39;
&gt; failed.

I run this command in order to get the process that is using the port 80:

    sudo netstat -ltnp | grep &#39;:80&#39;

Which returns this output:

    tcp6       0      0 :::80                   :::*                    LISTEN      1176/

To know which process is I run this command:

    ps -wlp1176

That returns: 

    F S   UID   PID  PPID  C PRI  NI ADDR SZ WCHAN  TTY          TIME CMD
    5 D    33  1176     1  0  80   0 -     0 exit   ?        00:00:00 apache2

But if I try to kill the process: 

    sudo kill -9 1176

It doesn&#39;t kill it, if I run again the netstat command still appears listening and apache start fails.

Any suggestions?

Starting apache fails (could not bind to address 0.0.0.0:80)

How can I know if a certain port is open/closed on linux ubuntu, not a remote system, using python? 
How can I list these open ports in python?

* Netstat: 
Is there a way to integrate netstat output with python? 




Content Type	Original Author	Original Content on Stackoverflow
Question	dbruning	View Question on Stackoverflow
Solution 1 - Windows 7	Colin Bowern	View Answer on Stackoverflow
Solution 2 - Windows 7	Mark Lakata	View Answer on Stackoverflow
Solution 3 - Windows 7	user5979788	View Answer on Stackoverflow
Solution 4 - Windows 7	Keith Nicholas	View Answer on Stackoverflow

What does "Can not obtain ownership information" in Netstat -ab mean?

Windows 7 Problem Overview

Windows 7 Solutions

Solution 1 - Windows 7

Solution 2 - Windows 7

Solution 3 - Windows 7

Solution 4 - Windows 7

mod_php vs cgi vs fast-cgi

UITextField Value Changed Event?

Attributions