Root access to modern finance.
Learn how to configure Nginx as a reverse proxy on Linux. Covers proxy_pass, headers, SSL termination, WebSocket support, and security hardening with examples.
Step-by-step guide to installing Python on Linux. Covers apt, pyenv, venv, and the PEP 668 externally-managed error on Ubuntu, Debian, and RHEL.
Install Redis on Linux the right way — step-by-step commands for Ubuntu, Debian, and RHEL, plus security hardening and kernel tuning every sysadmin needs.
Learn how to install PostgreSQL on Linux step by step. Covers Ubuntu, Debian, and RHEL with first-login setup, user creation, and remote access config.
Install Node.js on Linux the right way — nvm, apt, or NodeSource. Step-by-step commands for Ubuntu, Debian, RHEL, and Arch. Pick the method that fits your workflow.
Learn how to install K3s on Linux in minutes — single-node and multi-node setup, kubectl access, and deploying your first workload on lightweight Kubernetes.
Learn how to set up Samba on Linux step by step — smb.conf, user setup, firewall rules, SELinux context, and connecting Windows and Linux clients.
Learn to use Btrfs on Linux — create subvolumes, take snapshots, enable zstd compression, and run scrubs. Practical commands for every Linux admin.
Learn how to configure AppArmor on Linux—check status, create custom profiles, switch between modes, and harden your system with real command examples.
Learn how to configure SELinux on Linux: check and switch modes, manage file contexts, troubleshoot denials, and use booleans to harden your servers.
Learn how to set a static IP in Linux using Netplan, nmcli, or /etc/network/interfaces — with working examples for Ubuntu, RHEL, Rocky, and Debian.
Learn how to use iotop in Linux to monitor disk I/O per process in real time. Install, read output, use key flags, and diagnose disk bottlenecks fast.
Learn how to use nftables in Linux with real examples. Covers tables, chains, rules, and building a persistent server firewall from scratch.
Monitor CPU, memory, disk I/O, and network—historically. Learn how to install sysstat and use the sar command in Linux to analyze past performance.
Learn how to use Linux nice and renice commands to control process CPU priority. Practical examples for sysadmins managing servers, backups, and builds.
Learn how to install MySQL on Linux with this step-by-step guide. Covers Ubuntu and RHEL setup, mysql_secure_installation, users, and firewall rules.
Learn how to use the lsblk command in Linux with real examples. View block devices, UUIDs, and storage layout with essential options covered.
Learn how to use the vmstat command in Linux to monitor CPU, memory, swap, and I/O in real time. Includes output explanation and troubleshooting examples.
Configure /etc/fstab in Linux to automate disk mounting. Learn the six fields, UUID vs device names, key mount options, and how to recover if something breaks.
Learn how to change timezone in Linux using timedatectl, manual symlink, and dpkg-reconfigure. Includes NTP sync, UTC best practices, and real command examples.