Linux sysadmin
113 articles
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How to Configure Nginx as a Reverse Proxy on Linux
Learn how to configure Nginx as a reverse proxy on Linux. Covers proxy_pass, headers, SSL termination, WebSocket support, and security hardening with examples.
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How to Install PostgreSQL on Linux (Ubuntu, Debian, and RHEL)
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.
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How to Install Node.js on Linux: 3 Methods, 1 Right Answer
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.
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How to Install K3s on Linux: Lightweight Kubernetes for Your Homelab
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.
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Best Linux Terminal Multiplexer in 2026: tmux, Zellij, Screen, and Byobu Compared
I tested 4 Linux terminal multiplexers in 2026 — tmux, Zellij, GNU Screen, and Byobu — ranked by real sysadmin workflows and homelab use.
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How to Configure AppArmor on Linux: Profiles, Modes, and Real Fixes
Learn how to configure AppArmor on Linux—check status, create custom profiles, switch between modes, and harden your system with real command examples.
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How to Configure SELinux on Linux: Modes, Contexts, and Real-World Fixes
Learn how to configure SELinux on Linux: check and switch modes, manage file contexts, troubleshoot denials, and use booleans to harden your servers.
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How to Set a Static IP in Linux: Ubuntu, RHEL, and Debian Covered
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.
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How to Use iotop in Linux: Monitor Disk I/O Per Process Like a Pro
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.
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How to Use nftables in Linux: The Modern Firewall Every Admin Needs
Learn how to use nftables in Linux with real examples. Covers tables, chains, rules, and building a persistent server firewall from scratch.
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sar Command in Linux: Monitor Historical System Performance Like a Pro
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.
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How to Use nice and renice in Linux: Control Process Priority Like a Pro
Learn how to use Linux nice and renice commands to control process CPU priority. Practical examples for sysadmins managing servers, backups, and builds.
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How to Install MySQL on Linux: Step-by-Step Setup and Security Guide
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.
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lsblk Command in Linux: List Block Devices and Storage Layout
Learn how to use the lsblk command in Linux with real examples. View block devices, UUIDs, and storage layout with essential options covered.
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vmstat Command in Linux: Monitor CPU, Memory, and Swap in Real Time
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.
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How to Configure /etc/fstab in Linux (Without Bricking Your System)
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.
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How to Change Timezone in Linux: timedatectl and Manual Methods Explained
Learn how to change timezone in Linux using timedatectl, manual symlink, and dpkg-reconfigure. Includes NTP sync, UTC best practices, and real command examples.
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How to Use SSH Config File in Linux: Manage Servers Like a Pro
Use the Linux SSH config file (~/.ssh/config) to create aliases, configure ProxyJump, and manage multiple servers without typing long commands.
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Best Linux File Manager in 2026: 6 I Tested on My Homelab
I tested 6 Linux file managers in 2026 — from blazing-fast Yazi to classic Midnight Commander. Here's which GUI and TUI tools actually belong on your system.
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How to Set Up an NFS Server on Linux: Share Files Across Your Network
Learn how to set up an NFS server on Linux to share files across your network. Step-by-step guide for Ubuntu and RHEL with security tips and mount options.
Related topics
- Linux commands 62
- Command line 48
- Almalinux 21
- Linux networking 20
- Linux troubleshooting 20
- Linux security 17
- Shell scripting 16
- Bash 14
- Open source backup 13
- Ubuntu 12
- Homelab 11
- Systemd 10
