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Daniel Petri

Petri Contributor

Renowned as the creator of the acclaimed Petri IT Knowledgebase back in 1999 Daniel Petri has become a distinguished figure in the IT realm, recognized for delivering reliable, expertise-driven content. This website - www.petri.com - not only embodies Daniel's extensive technical skills but also stands as a symbol of his dedication to sharing knowledge and guiding professionals through the dynamic world of information technology.

Over the past 25 years, Daniel Petri's career is characterized by his unwavering commitment to quality IT training, provision of diverse solution architectures, and maintaining a customer-first approach that ensures high levels of satisfaction. Daniel's client-centric mindset has always been a cornerstone of his career, delivering concrete results that spur his clients' growth and success. Daniel's strong technical writing skills are evidenced by the thousands of technical documents, help guides, manuals, and articles he has penned, all drawing from his broad IT and security-oriented background.

See Daniel's bio: https://www.linkedin.com/in/danielpetri


Top rules for correct e-mail netiquette

Last Update: Oct 21, 2022

Perhaps one of the biggest problems with e-mail (besides the spam issue) is the fact that not many people know how to properly format their e-mail messages. Properly writing your e-mail is generally known as “e-mail netiquette”. The rules of e-mail Netiquette are not “rules” that are written or governed by any authority, but are considered…

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Disable Windows Server 2012 R2 Automatic Maintenance Using PSEXEC

Last Update: Oct 03, 2022

Having performance issues? You may be impacted by the Windows Server 2012 Automatic Maintenance functionality. Learn how to troubleshoot in Daniel Petri’s latest article.

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Add Additional Attributes to the User Objects

Last Update: Sep 26, 2022

How can I add additional attributes to the users objects in Active Directory? Windows 2000 and Windows Server 2003 Active Directory allows you to edit the Schema and add additional attributes to it. These attributes can be easily connected to existing Object Classes such as users, groups, computers and so on. Adding items to the…

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Subnetting Table

Last Update: Sep 02, 2022

Use this table to help you calculate Subnet Masks, available hosts per subnet or number of subnets per class. The table deals with Subnetting of only one octet. # of Masked bits # of Non-masked bits Bit pattern # of subnets =2^M What will the new subnet mask be? # of hosts per subnet (C…

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What’s System Restore in Windows XP?

Last Update: Aug 23, 2022

What is System Restore in Windows XP? System Restore is a component of Windows XP Professional that you can use to restore your computer to a previous state, if a problem occurs, without losing your personal data files (such as Microsoft Word documents, browsing history, drawings, favorites, or e-mail). System Restore monitors changes to the…

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Using System Restore in Windows Vista

Last Update: Aug 23, 2022

In Windows XP Microsoft introduced a new method of keeping a working copy of your system files called System Restore, and now we can also use it on Windows Vista. System Restore helps you restore your computer’s system files to an earlier point in time. It’s a way to undo system changes to your computer…

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Add User Account Information to Active Directory Users and Computers

Last Update: Aug 12, 2022

How can I add additional user account information option to the Active Directory Users and Computers context menu? As seen in the Add Unlock User Option to Active Directory Users and Computers article, many of the daily tasks of a network administrator is to monitor user accounts, logo activities, password changes and account options, such…

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Add “Take Ownership” to right-click menu in Vista

Last Update: Jul 19, 2022

In order to streamline the ownership of various files and folders in Windows Vista, you can add the “Take Ownership” option to your right-click menu. After clicking this icon, the owner of the selected file or folder will automatically change to your username. Please note that in order to use this feature you must have…

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Use RDP Client to Connect to a Different Port

Last Update: Jul 08, 2022

When working with Terminal Server or RDP you have the choice to change the XP RDP 5.1 or 5.2 client connecting port. For the “old” Windows 2000 Terminal Server client port changes see Use Terminal Server Client to Connect to a Different Port. If you’ve changed the listening port on the TS from its’ default…

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Windows Recovery Environment (RE): The Solution When A Computer Won’t Boot

Last Update: Jun 29, 2022

Daniel explains the Windows Recovery Environment (WinRE): how it automates the diagnosis and repair of an unbootable Vista, Windows 7 or Windows Server 2008/R2 installation and the security considerations to be aware of when using it.

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