Tips & Tricks : Analyzing Windows memory.dmp file


Many times you think how to extract some information from memory.dmp generated by Windows once it crashes. Let’s have a look into quick process, which might be very helpful in many cases during troubleshooting unexpected BSODs on client computers.

Before we start we need tool, WinDbg, which is available on Microsoft.com. In order to download WinDbg go to WDK and WinDbg downloads on Microsoft. On that page locate section Standalone Debugging Tools for Windows (WinDbg).

Once you download and install WinDbg we are ready to start.

So, let’s see what’s in memory.dmp



Code snippets : Execute SQL script using PowerShell


Recently I went through requirement of running SQL scripts on multiple databases on different servers. As the list of databases was different from script to script I decided to create universal solution, which will allow to easily prepare for deployment and can be simply reused at any time.

As a platform to execute scripts I went with PowerShell as that provides flexibility in case additional functionality will be required.

Whole solution contains 3 files:

  • SqlExecutionInflow.csv – file contains list of databases and servers where particular database is located. It is simple CSV file with 2 columns
  • SqlExecQuery.sql – contains SQL script which will be executed against all databases listed in SqlExecutionInflow.csv
  • SqlExec.ps1 – main script which load SqlExecInflow.csv and executes query from SqlExecQuery.sql

All files have to be placed in same folder. As a result script will create transcript file with output from all executed commands.

And here are example files and script itself…



How-to : Install Bareos with WebUI on openSUSE 13.2


Recently I went through installation process of Bareos on openSUSE. Bareos seems to be interesting solution for backups in heterogeneous  environments.

Ok,let’s start and see how to deploy in 5 steps:

  • Step 1: Add repository with Beros and Beros WebUI; Install Beros
  • Step 2: Create Bareos database and Tables on MySQL
  • Step 3: Configuring Bareos (few config files)
  • Step 4: Starting services and accessing WebUI portal
  • Step 5: Enable/Autostart Bareos services (optional)



Tips & Tricks : MediaWiki 1.25.1 and VisualEditor


In case you want to deploy MediaWiki 1.25.1 with VisualEditor use following components:

Configuration details for LocalSettings.php for these components can be found here:

When you download VisualEditor from Git repository installation with MediaWiki 1.25.1 is more likely to fail.


Cheat Sheet : SCO Vi Quick Reference Guide


I just found vi reference from Santa Cruz Operation (SCO) 🙂 Nice piece of memorabilia as well as handy reference for vi beginners.


Tips & Tricks : Using EPEL with CentOS


If you use CentOS and want to add some extra packages you can use EPEL.

Extra Packages for Enterprise Linux is project created by Fedora.

In order to use repositories on CentOS first download and install RPM appropriate for your version of CentOS from here:

Method 1


Then install it and enjoy more packages from new repo.


Method 2

[root@localhost ~]# yum install epel-release

Here is example from CenOS 7 how to add EPEL repositories:



How-To : openSUSE & keepalived for Firewall HA


Current expectations from all type of systems and services is to be available without any disruption. One of mission critical systems is gateway/firewall. Of course you can use multiple products available on the market. One of them is openSUSE, which is perfect to act as gateway/firewall between Internet and production systems. So, how to provide redundancy for openSUSE and same time be able to keep it up-to-date without any disruption for production systems?

openSUSE 13.2 with keepalived provides all technology required to make your firewall high-available.

Here is diagram of Lab created to configure and test openSUSE with keepalived:



Code snippet : Sending email from PowerShell script


If you want to send email from PowerShell script via Google Mail:

$SMTPServer = "smtp.gmail.com"
$SMTPPort = "587"
$SMTPUsername = "sender@gmail.com"
$SMTPPassword = "password"

$EmailSenderAddress = New-Object System.Net.Mail.MailAddress("sender@gmail.com", "PowerShell Automated Email")

$EmailFrom = $EmailSenderAddress
$EmailTo = "recipient@gmail.com"
$EmailCc = "recipient@hotmail.com"
$EmailAttachment = "C:\Scripts\Attachment.txt"
$EmailSubject = "Automated Email with Report."
$EmailBody = @"
Please find attached report.

$EmailMessage = New-Object System.Net.Mail.MailMessage
$EmailMessage.Subject = $EmailSubject
$EmailMessage.Body = $EmailBody
$EmailMessage.From = $SMTPUsername

$SMTPSession = New-Object System.Net.Mail.SmtpClient($SMTPServer, $SMTPPort);
$SMTPSession.EnableSSL = $true
$SMTPSession.Credentials = New-Object System.Net.NetworkCredential($SMTPUsername, $SMTPPassword);
Write-Host "Mail Sent"

Code snippets : Encrypted password in PowerShell


Many times there is a need to store password in PowerShell script. Unfortunately to leave password in script is insecure solution and might cause an issue.

So, what to do if there is a need to have password in a script and we don’t want to have it embedded in clear-text in script?

Best way is to encrypt it and store in the file and then re-use it when required.

Create file with encrypted password

$secureString = Read-Host -AsSecureString "Enter a secret password"
$secureString | ConvertFrom-SecureString | Out-File C:\Scripts\storedPassword.txt

Use encrypted password in script

$secureString = Get-Content -Path C:\Scripts\storedPassword.txt | ConvertTo-SecureString
Remember that password has to be encrypted on the account which will be running the script. So, in case you plat to use Task Scheduler to run PowerShell script, start PowerShell windows as particular user and then create file with encrypted password.

Tips & Tricks : Install Node.js on Debian 7.0 “Wheezy”


As on Debian 7.0 Node.js is not included in standard repositories, if you want to install it login to server as a root and issue following commands:

apt-get install curl
curl -sL https://deb.nodesource.com/setup | bash -
apt-get install -y nodejs
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