Saturday, 7 January 2017

How Invoke-Command works

4:37 pm
To know how Invoke-Command works remotely check the below image :





Apart from this, lets talk more about Invoke-Command.

  • If you run invoke-command locally will this DeSerialization, conversion to XML etc will happen? the answer is NO. Since you are running it locally all this process are not performed.
  • Further a Deserialized object Type i.e. the data fetched remotely through invoke-command contains only few methods as shown in the below image. Hence suppose you are fetching service info using invoke-command remotely and storing the output in a variable, you won’t get methods to Start or Stop the service.


Example :

$Service = Invoke-Command -Cn “Test” -ScriptBlock {get-service bits}

$Service will show the process details, but you can’t perfom $Service.Stop() or $Service.Start() since its the deserialized data.

But you can perform like this :

$Service = Invoke-Command -Cn “Test” -ScriptBlock {get-service bits | Stop-Service}

This will do the task you are looking for.


Hope you all liked the Post. Do Like and Share with your friends

Simplest way to create a log file with Date and Time using PERL

4:25 pm
Hi, today em gonna show the simplest way to create log files and add date and time to it so that we can know which event occurred at what point of time. So lets begin.



Fetching and Storing Date and Time :

use POSIX qw(strftime);
my $now = strftime(‘%d-%m-%Y %H:%M:%S’,localtime);

Creating Log File :


open ($Log,”+>>”,”/home/amar/MyApplication.log”);


Printing contents to Log File :

print $Log (“$now ******[START OF SCRIPT : DATABASE CHECK]*******\n”);

Full Script :




This is the simplest way to create a Logger file in Perl. Hope you all enjoyed the post. Do like and Share for more.

JBPM Time Scheduler Format Explained

4:16 pm
Hey Friends, Today am gonna explain you the time format used by JBPM Schuduler.

Those who don’t know what JBPM is, its basically a Open Source workflow engine used to execute Business Process. For more details read here : JBPM Wikipedia

After lots and lots of googling i got the timer info, hence i am sharing the same below :


JBPM SCHEDULER SEQUENCE : 

  • Sec
  • Min 
  • Hour 
  • Day of the Month
  • Month
  • Day of the Week
  • Year

So suppose, you wanted to trigger process by :

Example 1 : 2 AM Sunday Daily

Timer :

SEC MIN HOUR [DAY OF MONTH] MONTH [DAY OF WEEK] YEAR
0 0 2 ? * SUN *


Here, ? mean you don’t know the exact Day of the Month, so JBPM will automatically find it for you just need to put ? ,

while * is for all , here in the example it means the process should be triggered in all the Months of a year.

Example 2 : 4:25 PM All days of a week

Timer : 0 25 16 * * ?

Lets increase the complexity, suppose you wanted to execute a script every 2 hours in a day then what will be scheduled time in JBPM ?

Example 3 :
Every 2 hours a day (means 1 AM, 3 AM, 5 AM…. and so on)

Timer : 0 0 1,3,5,7,9,11,13,15,17,19,21,23 * * ?



Hope you all enjoyed the post. Do like and Share for more Stuffs like this. For any queries comment below.

Windows Services Startup Type Explained

4:03 pm
Hi Geeks, Today I was working on a Service related script so thought of sharing some useful information related to Services Startup Type which most of the people knows but doesn’t know about the functionality. So lets begin.

What are Windows Services and what they do ?


Windows Services are the components or applications that starts when your computer is booted up and runs in the background mode helping the application to work smoothly and finally stops when the computer shuts down.


For Example,

If you want to send or receive any Fax, then the Fax service should be running in the background to perform the Fax activity.

How many Service Startup Types are there and what they do ?



There are 4 Service Startup Types available :

1. Automatic

Explanation : Automatic Service Startup Type starts the service automatically when the system boot up is done. So if we are having a machine of less memory and there are lots of services in Automatic Startup type then your machine will take more time to start as in normal state, I hope you are getting the point why multiple application services should not be in automatic startup mode.

2. Automatic ( Delayed Start )

Explanation : Automatic (Delayed Start) Service Startup Type is similar to Automatic Type i.e. starts the service automatically when the system boot up is done. The only difference is that, it waits for other critical or higher priority tasks to be formed first and in the end the service is started.

3. Manual

Explanation : Manual Service Startup Type as the name suggests is required to be started manually. This service is not started by default i.e. it will not start when your computer starts but can start by any dependent application when required. Services which requires to be used very often should be kept in Manual state like Disk Defragmenter Service , since we will not perform defragmentation regularly this service is kept in Manual state by default.

One more thing to understand here, if any service got started manually will be stopped when the computer is shutdown.

4. Disabled

Explanation : If a Service is in Disabled mode, it cannot be used by any application by default. If there is any dependent application, it will fail since it can’t be started.

Do like and Share if you like this post. Happie Learning :)

How to close a Process run by a specific User using PowerShell

3:34 pm
Hi Geeks, Today we are going to learn how to close or kill a process run by a specific user.

Lets take an example, there are 2 different users : Admin and TestUser , Now Admin and TestUser both are logged into the same machine and performing some important task in Internet Explorer.

If Admin does this : Get-Process -Name “iexplorer”

It will get all the list of Internet Explorer process run by both Admin as well as TestUser.



Now Admin wants to Kill or Stop the Processes which are being executed by him only. So in order to perform this task you can to use the GETOWNER Method.


Full Script :



Hope you all enjoyed the post, Do Like , Share and comment if you have any query related to this.

How to take Snapshot of the screen using PowerShell

2:31 pm
Hi Guys, Welcome to the Powershell Tips and Trick section. Today one of the follower of my page The Powershell Geek asked me how to take Snapshot of the Screen using PowerShell.

Before beginning let me tell you , few months back one of my friend got the same requirement from our client i.e. Login to a website, then performing certain tasks and once done take snapshots as a proof that its done successfully. So here’s the Code, its already available in Technet anyways.

CODE :



OUTPUT IMAGE FILE :




So now you can keep the code in between your script or where ever required to take the Snapshot. Hope you all enjoyed it, do Like and Share.

Source : Technet

Error Handling Tips in PowerShell

3:04 am
Hi Geeks, We all know the ways to handle error in scripting or programming languages i.e Try, Catch, Finally and so on. The same thing can also be done in PowerShell.

Example :

Try { $a = 1/0 } Catch { Write-Host “Got Exception” }




But suppose your script is too long and you want your Error should be handled in such a way that you can know exactly what caused the error and at which path or line number. So to do so PowerShell provides some cool properties as given below :

To Catch the Complete Exception -> $_.Exception

To Find the exact Error Line number -> $_.InvocationInfo.ScriptLineNumber

To only get the Exception Message -> $_.Exception.Message

So will look like this :

Try
         Your Script Goes here 
}
Catch
{
        $Exception = $_.Exception
        $Line = $_.InvocationInfo.ScriptLineNumber
        $Message = $Exception.Message
}

FINAL OUTPUT :




                                 
                          Hope you all enjoyed the Tutorial. Do like and Share for more.




Simplest way to Hack IBM BladeCenter Management Devices

2:41 am
Hi Everyone, Today I will show you the simplest way to hack IBM BladeCenter devices whose password has not been changed i.e. using the default credentials.

Before beginning this tutorial you should know the default credentials used by most IBM BladeCenter devices :

Username : USERID ; Password : PASSW0RD (it’s Zero not O)

So lets begin,

Step 1 : Click on the Link to open Shodan website -> Shodan.io

About Shodan , Shodan is a very powerful tool which helps to find different vulnerable network devices and helps us to gather ample amount of information about a network.

Step 2 : Once the Url is loaded, type /private/main.php in the search box which will basically help you to get multiple IBM Management console list available publically . See the image below for reference.




Step 3 : It will list lots and lots of Vulnerable devices,now just try out your luck . Some or more devices might be using the default credentials. I got one!!





Step 4 : Once you get the console like above, enter the credentials provided above, if you are lucky enough you will be able to get the console below, But remember all your system information will be updated into their logs so try it on your own Risk. A new session will be provided like below after successful login.


Step 5 : Once clicked on Continue, you will get the complete access of the Management devices. You will be able to see VM’S of Production or development environment or maybe some other network devices.


Further just to know how much problem’s this can create is after login you can get access to any VM remote console or even power off the machine as shown below. Hence, the default passwords should always be changed.




Hope you all like this Tutorial, this tutorial is made for only educational purpose and to let people know the circumstances of NOT Changing the default password of big Applications like IBM BladeCenter.


                                                     Do like and Share if you all enjoyed it.

How to add multiple contents in a HTML Report using Powershell

2:27 am
Hey Geeks,

Today em gonna show you how to add multiple contents like CPU Utilization, Disk check, Services Check etc. into a single HTML Report file. Few days back I got this requirement to add multiple contents into a single report file and once the report generation is done send a mail.

So lets learn how to achieve this through Powershell.

Powershell provides two properties for this PRECONTENT & POSTCONTENT ,so whatever you want to add should be kept in Pre Content and finally we can merge it using Post Content. Further you can also use Add-Content , Append or Out-File to do the same. But in this example I will show you Pre Content and Post Content.

Sample 1 : How to Add contents 


$Services = gwmi -Class Win32_Service -ComputerName $Server -Credential $Cred |?{$_.name -match ‘Test’} | Select Name,State | Select -last 4 | ConvertTo-HTML -AS Table -Fragment -PreContent ‘<h2>Services Report</h2>’| Out-String


Sample 2 : How to Merge all the contents


ConvertTo-HTML -head $Style -PostContent $Services, $Disk_Report, $SFTP_Table -PreContent ‘<h1><u><center>REPORT GENERATION</u></center></h1>’| Out-File $Report_Path

Output :




Full Sample Script Below :



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