Posted inVMware
How to Safely Reset a Lost or Forgotten ESXi Root Password
Discover 3 safe ways to recover a lost VMware ESXi 7.0/8.0 root password using an Ubuntu Live USB, vCenter Host Profile, or reinstalling without losing VM data.
Posted inVMware
Enable VMware vSphere Quick Boot: Cut ESXi Maintenance Reboot Time by 80%
VMware vSphere Quick Boot allows ESXi to bypass the BIOS/UEFI POST process, slashing reboot times from 15 minutes to under 90 seconds. Learn how to verify compatibility, enable it in vLCM, and troubleshoot real-world issues.
Posted inUbuntu
How to Set Up Two-Factor Authentication (2FA) for SSH on Ubuntu with Google Authenticator
Step-by-step guide to setting up two-factor authentication (2FA) for SSH on Ubuntu with Google Authenticator. Combine SSH keys and TOTP codes for robust server security.
Posted inUbuntu
How to Install and Configure WireGuard VPN Server on Ubuntu: Setting Up a High-Speed Virtual Private Network
A step-by-step guide to building a WireGuard VPN server on Ubuntu. Master Cryptokey Routing, tune MTU to prevent packet bottlenecks, and generate QR codes for quick client setup.
Posted inCentos
How to Manage and Limit CPU and RAM on CentOS Stream 9 Using cgroups v2 and systemd Slices
How to handle memory leaks and CPU bottlenecks on CentOS Stream 9. A step-by-step guide to isolating and limiting service resources using cgroups v2 and systemd slices.
Posted inVirtualization
How to Run Nested VMware ESXi 8.0 on Proxmox VE: Build a vSphere Lab Without HCL Constraints
Want to build a vSphere 8.0 lab cluster but blocked by VMware HCL due to Realtek NICs or legacy Intel CPUs? Running Nested ESXi 8.0 on Proxmox VE is the fastest way to repurpose older servers.
Posted inVirtualization
Rescue KVM/Proxmox VMs with libguestfs: Reset Root Password, Fix Boot Errors, and Recover Data Quickly
Learn how to use the libguestfs tool suite on Linux to rescue KVM/Proxmox VMs: fix fstab errors, reset root passwords, and mount virtual disks to extract data with single commands.
Posted inLinux
Linux AppArmor Guide: Creating Security Profiles to Sandbox Applications
A hands-on guide to configuring AppArmor on Ubuntu/Debian: writing custom profiles, auditing logs in complain mode, and isolating processes against privilege escalation.
Posted inUbuntu
Installing and Configuring CrowdSec on Ubuntu: A Production-Ready Alternative to Fail2ban
A hands-on guide to installing and configuring CrowdSec on Ubuntu Server. Discover why CrowdSec outperforms Fail2ban through community CTI and resource efficiency.
Posted inLinux
How to Use Snapper on Btrfs: Automatic Snapshots and Linux Rollback on Failed Updates
Protect Linux servers from broken kernel and package updates using Btrfs and Snapper. A comprehensive guide to automated snapshots and 30-second system rollbacks.