Articles

Overview Symbolic links are commonly used in various operating systems, including Unix-like systems such as Linux and macOS, as well as Windows, to create flexible and dynamic file structures, facilitate file organization, and simplify administration tasks. They are frequently employed for creating shortcuts to files or directories, creating virtual copies of files, and providing access to files or directories located in different parts of the file system. In short, by using symbolic links, we can easily redirect one folder or files to another location....

Overview Terminating a stuck Veeam jobs, or processes can be quite challenging as it could take some time to stop. If you notice the job in “Stopping” state, for days, or even weeks, you may need to terminate all Veeam services to stop those stuck jobs described in Veeam KB1727 article. In this situation, you will need to ensure all the other health jobs are finished first. Read the following carefully before deciding to forcibly stopping the services....

Introduction 802.1X is a network access control (NAC) standard that provides an authentication framework for controlling access to network resources. It is a part of the IEEE 802.1 group of protocols, which defines how devices in a Local Area Network (LAN) communicate with each other. The main purpose of 802.1X is to ensure that only authorized devices or users are allowed to connect to a network, thereby enhancing network security. It operates at the link layer of the OSI model and is primarily used for wired and wireless Ethernet networks....

Overview When working on remote SSH on your linux machine, you might have a situation that you need perform a long-running task such backup, patch, etc, it requires you to keep the ssh connect until the process is completed. If your session is intentionally or unintentionally disconnected, then the process will be stopped. To prevent that, you can use a utility called screen that allows to resume the sessions. What is Screren Screen is a terminal multiplexer to create multiple virtual terminal on an SSH session....

Nano File Editor Overview of nano’s shortcuts The editor’s keystrokes and their functions. File handling Keystroke Function Ctrl+S Save current file Ctrl+O Offer to write file (“Save as”) Ctrl+R Insert a file into current one Ctrl+X Close buffer, exit from nano Editing Keystroke Function Ctrl+K Cut current line into cutbuffer Alt+6 Copy current line into cutbuffer Ctrl+U Paste contents of cutbuffer Alt+T Cut until end of buffer Ctrl+] Complete current word Alt+3 Comment/uncomment line/region Alt+U Undo last action Alt+E Redo last undone action Search and replace Keystroke Function Ctrl+Q Start backward search Ctrl+W Start forward search Alt+Q Find next occurrence backward Alt+W Find next occurrence forward Alt+R Start a replacing session Deletion Keystroke Function Ctrl+H Delete character before cursor Ctrl+D Delete character under cursor Alt+Bsp Delete word to the left Ctrl+Del Delete word to the right Alt+Del Delete current line Operations Keystroke Function Ctrl+T Execute some command Ctrl+J Justify paragraph or region Alt+J Justify entire buffer Alt+B Run a syntax check Alt+F Run a formatter/fixer/arranger Alt+: Start/stop recording of macro Alt+; Replay macro Moving around...

Network Design And IP Plan Management: 10.0.10.0/24 -> For comunication between Servers. Heartbeat: 10.0.11.0/24-> For comunication between cluster nodes. SAN: 10.0.8.0/27 or /24 -> For comunication to the SAN storage. Server Name Management IP SAN1 IP SAN2 IP HeartBeat IP SAN Storage 10.0.10.8 10.0.8.5 10.0.8.6 10.0.8.7 10.0.8.8 CA-HVC0 10.0.10.10 - - - CA-HVC01 10.0.10.11 10.0.8.11 10.0.8.21 10.0.11.11 CA-HVC02 10.0.10.12 10.0.8.12 10.0.8.22 10.0.11.12 CA-HVC03 10.0.10.13 10.0.8.14 10.0.8.23 10.0.11.13 Requirement You need at least 3 servers with the same hardware specification with 64 bit processors supports a virtualization Intel Virtualization Technology (Intel VT) or AMD Virtualization (AMD-V) technology....

Introduction If you want to completely remove a child domain and its domain controller that was no longer active or orphaned due to some reasons, you can follow the following steps. Be carefull and follow the steps, and remember that the child domain controller server which is already removed is probibited to be turn of until you remove the ADCS role or reinstall the server. Steps You will need to remove the child domain controllers first, and then proceed to remove the child domain from your forest....

Introduction Pi-hole and AdGuard Home are open-source network-wide ad blocker and privacy protection software designed to protect any devices on your home. It functions as a DNS (Domain Name System) sinkhole, which means it filters and blocks requests to ad and tracking domains at the DNS level before they reach the devices on your network. This effectively prevents unwanted ads, pop-ups, and tracking attempts from appearing on all your family devices....

Overview Wazuh is an open-source security information and event management (SIEM) tool. It is designed to help organizations detect and respond to security threats by providing log analysis, intrusion detection, vulnerability detection, and other security-related capabilities. Wazuh is built on top of the ELK (Elasticsearch, Logstash, and Kibana) stack and integrates with other security tools to provide a comprehensive security solution. Wazuh Components The Wazuh indexer is a highly scalable, full-text search and analytics engine....

General - Get ESXi build and version numbers esxcli system version get - Get host hostname, domain, and FQDN esxcli system hostname get - Get date and time ESXi was installed esxcli system stats installtime get - List local users on ESXi host esxcli system account list - Create local ESXi user esxcli system account add -d="Description" -i="username" -p="password" -c="password" - List available commands with descriptions esxcli command getdetails - List all available namespaces with corresponding commands esxcli esxcli command list - Check maintenance mode esxcli system maintenanceMode get - Enable/Disable maintenance mode esxcli system maintenanceMode set –enable true - Reboot/Restart ESXi host esxcli system shutdown reboot -r "message" - Reboot/Restart ESXi maintenance mode host with countdown timer esxcli system shutdown reboot -d 10 -r "Patch Updates" - Get CPU information of host (family, model, and cache) esxcli hardware cpu list - Get memory information (available and non-uniform memory access) esxcli hardware memory get - Configuration of and information about syslog esxcli system syslog - Generate support and log information bundle from host vm-support Management - Restart Management, HA Services (change to /sbin/services directory) restart - List Virtual Machines (VMIDs) vim-cmd vmsvc/getallvms - List running VMs with world ID esxcli vm process list - Terminate running VM process (forcibly powers off VM) esxcli vm process kill - Power On vim-cmd vmsvc/power....