Learn how to fix Ubuntu boot issues step by step — including GRUB repair, filesystem checks, and common EFI/BIOS troubleshooting.

Learn how to configure Nginx as a load balancer for multiple web servers with zero downtime updates using health checks and rolling restarts.

Ultimate LVM Cheat Sheet for Linux Sysadmins A complete reference for managing LVM on Linux systems. Covers creation, management, snapshots, thin provisioning, monitoring, troubleshooting, and bes...

☁️ Cloud & Virtualization Power Cheat Sheet for Sysadmins Quick commands and notes for real-world hybrid environments (Proxmox, OpenNebula, KVM, AWS, GCP). 🔹 Proxmox VE (PVE) Cluster &...

Ansible Cheat Sheet for Sysadmins A complete reference for Ansible automation, including commands, playbooks, modules, inventory management, vaults, and expert tips. 🔹 Ansible Basics Check ...

Linux Security Cheat Sheet for Sysadmins A focused reference for Linux security, hardening, auditing, and compliance best practices. 🔹 User & Access Management Check Logged In Users: ...

Ultimate Linux Sysadmin Cheat Sheet A complete reference for Linux sysadmins, combining Basics, Advanced Tuning, and Security Hardening. 🔹 File Management List Files: ls -l ls -la ...

Linux Basics Cheat Sheet for Sysadmins A handy reference for day-to-day Linux system administration. 🔹 File Management List Files: ls -l # Long listing format List Hidden Fil...

Linux Advanced Cheat Sheet for Sysadmins This cheat sheet is for Linux sysadmins who want advanced commands, tuning, and hardening techniques for production-grade systems. 🔹 System Performance ...

Docker Cheat Sheet A quick reference guide for Linux sysadmins managing Docker containers. 🔹 Common Container Commands Run a Container: docker run -it ubuntu Run a Container i...