Very often ‘too many open files’ errors occur on high-load Linux servers. It means that a process has opened too many files (file descriptors) and cannot open new ones. On Linux, the “max open file limit” is set by default per process or user and the values are rather small.
Windows Server: Administration Guides
Step-by-step tutorials and comprehensive courses covering Windows Server installation, configuration, administration, and management. Learn to deploy server roles, manage Active Directory, configure networking, automate tasks with PowerShell, and implement security best practices for Windows Server 2012, 2016, 2019, and 2022 editions. Ideal for beginners and IT professionals seeking practical, hands-on knowledge to master Windows Server environments.
Windows 10 and 11 Tutorials for System Administrators
Guides and technical tutorials for system administrators, focusing on the configuration, deployment, and management of Windows 10 and Windows 11 desktop operating systems. Step-by-step instructions on installation, deployment, policy configuration, security hardening, and administrative tools to optimize Windows enterprise environments.
Group Policy (GPO) Guides for Admins
Clear, concise tutorials on creating and managing Group Policy Objects to control user and computer settings, enforce security, and streamline network administration in Active Directory environments.
- Configuring Firewall Rules With Group Policy
- How to Copy Files or Folders to All Computers with GPO
- Updating Group Policy Administrative Templates (ADMX) Files
- Active Directory Password Policy
- Applying Group Policy troubleshooting guidance
- Deploying printers via GPO
- Running PowerShell scripts using Group Policy
- Local Groups Policies export and import on Windows
Active Directory: Setup, Configuration, and Best Practices
Step-by-step tutorials and comprehensive resources for installing, configuring, and managing Active Directory Domain Services (AD DS). Learn how to set up domain controllers, design forest and domain structures, create users and groups, and implement security best practices.
- Updating AD Group Membership Without Restart or Logoff
- How to Detect the Source of Account Lockout in Active Directory
- Adding an Additional Domain Controller To an Existing AD Domain
- Active Directory Health Check
- Get-ADDomainController: How to Get Domain Controller Information with Powershell
- How to Transfer os Seize FSMO Roles in Active Directory
- Active Directory Backup Best Practices
- How to Reset Domain Admin Password in Active Directory
- Fix Trust Relationship Failed Issue without Domain Rejoining
- How to Extend Password Expire Date in Active Directory
- How to Find Inactive Accounts in Active Directory
Enterprise Virtualization Platforms
Expert guides and tutorials for system administrators on VMware, Hyper-V, and Proxmox virtualization. Covering installation, configuration, management, and optimization to build robust and scalable virtual environments.
PowerShell Scripting Tutorials
Practical guides to automate and manage a wide range of IT tasks using PowerShell. Learn how to streamline system administration, Active Directory, network configuration, software deployment, Microsoft 365 management, and more through powerful scripting and cmdlets.
VMware:Install and Configure Guides
Detailed walkthroughs for installing VMware ESXi, vCenter Server, and VMware Workstation Player, including configuration of virtual machines, network settings, and storage options to optimize your virtual infrastructure.
- VMware ESXi: Create VMFS Datastore on USB Drives
- Configuring iSCSI Datastore on VMware ESXi
- Add Drivers into VMWare ESXi Installation Image
- Adding Sound Controller to a VMWare VM
- Using Free VMware vSphere Hypervisor
- Adding an ESXi host to the VMware vCenter (vCSA)
- Reset VMware ESXi root password
- Disable the Virtual Machine Auto Suspend Feature in VMware Workstation/Player
Remote access to the command prompt (server console) via SSH is disabled by default on VMware ESXi hosts. So, when connecting to an ESXi host over SSH, you will get…
- Active DirectoryPowerShellWindows 10Windows 11Windows Server 2019
Find Windows OS Versions and Builds in Active Directory
February 20, 2023Let’s look at several ways to inventory versions and builds of Windows OSs in an Active Directory domain (it is especially relevant for Windows 10). If you haven’t any tools…
- PowerShellWindows Server 2016Windows Server 2019
Migrating RDS Roles (Connection Broker, Web Access) to Another Server
March 11, 2024This guide should help you to migrate (move) Remote Desktop Connection Broker and RDS Web Access roles to another server. In this example, we will migrate the RDS Connection Broker…
- Active DirectoryGroup PoliciesPowerShellWindows 10Windows Server 2019
How to Enable and Configure WinRM (Windows Remote Management) via GPO
August 9, 2024In this article, we will show how to enable and configure Windows Remote Management (WinRM) on domain computers using Group Policy (GPO). Windows Remote Management is an implementation of the…
- Windows 11Windows Server 2019
Adding USB 3.0 and NVMe Drivers to Windows 7 Install Media
March 11, 2024The Windows 7 RTM distribution doesn’t support USB 3.0 and NVME controllers out-of-the-box, and you can encounter some problems when installing Windows 7 on a computer/laptop having USB 3.0/3.1 ports…
- PowerShellWindows 10Windows 11Windows Server 2016Windows Server 2019
Configuring SFTP (SSH FTP) Server on Windows
March 17, 2024You can use the built-in OpenSSH package in Windows to easily enable secure file transfers between the client and Windows server using the SFTP (Secure FTP) protocol. In this article,…
- PowerShellWindows 10Windows 11Windows Server 2019Windows Server 2022
Start Menu or Taskbar Search Not Working in Windows 10/11
April 22, 2025The Start Menu search feature is used more often in Windows 10 and 11 than in previous OS versions. You can use Windows Start Menu search to quickly find an…
- Hyper-VPowerShellWindows Server 2016Windows Server 2019
Hyper-V Virtual Machine Stuck in Stopping/Starting State
March 16, 2024If your virtual machine running on Hyper-V is stuck for some reason, stopped responding, and doesn’t start/stop/reset after clicking the corresponding buttons in the Hyper-V Manager console, you can force-stop…
When a user searches using the Start menu in Windows 10 or Windows 11, the search results show suggestions from the local computer (files, apps, settings) and search results from…