77 articles
comparison
Ubuntu vs Debian: Which Should You Choose
Ubuntu vs Debian compared for sysadmins: release cycles, package freshness, LTS support, cloud deployment, and real performance data. Pick the right one.
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comparison
Arch Linux vs Ubuntu: Which Is Right for You
Arch Linux vs Ubuntu compared for sysadmins and DevOps engineers. Package managers, update cycles, stability, and real-world production use cases covered.
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best
Best Linux Distro for Servers in 2025
Ubuntu 24.04, RHEL 9, Debian 12, or Rocky Linux 9 - we tested all four on real server workloads. Here's which distro wins for each use case.
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guide
How to Set Up SSH on Linux
Set up SSH on Linux the right way: install, harden, key auth, port forwarding, and config tuning. Real commands for sysadmins and DevOps engineers.
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guide
Linux File Permissions Explained
Master Linux file permissions: octal modes, ACLs, setuid, sticky bits, and real-world examples for sysadmins and DevOps engineers.
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best
Best Linux Distro for Beginners in 2025
We tested 8 beginner Linux distros in 2025. Here are the real numbers on install time, RAM usage, and which one to actually recommend to new users.
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guide
Linux Cron Job Tutorial: Schedule Tasks
Schedule Linux tasks with cron: syntax, real examples, crontab pitfalls, and production-ready patterns for sysadmins and DevOps engineers.
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guide
Ubuntu Server Setup Guide: First Steps
Harden and configure Ubuntu 24.04 LTS from first login to production-ready in under 30 minutes. Real commands, no filler, for sysadmins.
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guide
How to Harden a Linux Server: 2025 Checklist
A practical Linux server hardening checklist for sysadmins: SSH lockdown, firewall rules, kernel tuning, auditd, and more. Real commands, tested configs.
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best
Best Linux Desktop Distro in 2025
We tested 8 Linux desktop distros in 2025 on real hardware. Here are our picks for sysadmins and DevOps engineers, with benchmarks and real commands.
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guide
How to Install and Configure Nginx on Linux
Install, harden, and tune Nginx on Linux in 2026. Real commands for Ubuntu, RHEL, and Debian. Covers TLS, worker tuning, and production config.
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guide
Docker on Ubuntu: Complete Setup Guide
Install and configure Docker on Ubuntu 24.04 LTS. Real commands, daemon hardening, Compose v2, and production-ready setup for sysadmins.
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comparison
Nginx vs Apache in 2025: Which Web Server
Nginx vs Apache benchmarked in 2025: concurrency, memory, config syntax, modules, and a direct recommendation for sysadmins running production workloads.
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guide
Bash Scripting Tutorial for Beginners
Learn Bash scripting with real commands, real examples, and sysadmin-focused patterns. Variables, loops, functions, error handling, and more in one guide.
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guide
How to Set Up Nginx as a Reverse Proxy
Set up Nginx as a reverse proxy with SSL termination, upstream health checks, and headers configuration. Real commands, tested on Nginx 1.26.
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guide
systemd Tutorial: Managing Services on Linux
Master systemd service management with real commands: unit files, targets, timers, journald, and dependency graphs. For sysadmins who need results fast.
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guide
grep Command Tutorial: Find Anything in Linux
Master grep with real examples: regex, recursive search, context flags, performance tips, and common sysadmin patterns. Tested on GNU grep 3.11.
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reference
Linux Crontab: Practical Examples
Practical Linux crontab examples for sysadmins: log rotation, backups, monitoring, and advanced scheduling with real commands and syntax.
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guide
Linux Firewall: UFW Guide for Beginners
Master UFW on Linux: real commands for rules, application profiles, logging, rate limiting, and IPv6. Tested on Ubuntu 24.04 and Debian 12.
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guide
Linux Process Management: ps, kill, top
Master Linux process management with ps, kill, and top. Real commands, signal tables, filtering tricks, and automation patterns for sysadmins in 2026.
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reference
Linux Permissions: chmod and chown Reference
Complete chmod and chown reference with octal modes, ACLs, recursive ownership, and real commands for Linux sysadmins and DevOps engineers.
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guide
Linux User Management: adduser, chmod, sudo
Master Linux user management with adduser, chmod, and sudo. Real commands, permission models, and sudoers config for sysadmins and DevOps engineers.
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guide
Nginx Configuration Guide: Essential Settings
Master Nginx essential settings with real configs for performance, security, and TLS. Tested on Nginx 1.26 with actual benchmarks and production examples.
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guide
Linux SSH Config File: Full Guide and Options
Master the SSH client config file with real examples, per-host settings, ProxyJump chains, multiplexing, and key management for sysadmins and DevOps.
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comparison
Linux Containers vs VMs: Key Differences
Containers and VMs solve different problems. We tested both under load to show you exact overhead, startup times, and when to pick each in 2026.
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comparison
Linux Shell Comparison: bash vs zsh vs fish
Bash, zsh, and fish compared for sysadmins and DevOps engineers. Real benchmarks, scripting gotchas, and a direct recommendation on which shell to use.
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reference
Linux Networking Commands Cheatsheet
Essential Linux networking commands for sysadmins: ip, ss, nmap, tcpdump, netstat, curl, dig and more. Real examples, real flags, no filler.
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guide
Linux Disk Management with LVM
Master LVM on Linux: PV, VG, LV setup, live resizing, snapshots, and thin provisioning with real commands tested on RHEL 9 and Ubuntu 24.04.
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guide
Linux Performance Tuning: Practical Techniques
Real sysadmin techniques for Linux performance tuning: kernel parameters, CPU scheduling, I/O, memory, and network tuning with tested commands and numbers.
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comparison
Linux Package Managers: apt vs yum vs pacman
Compare apt, yum, and pacman package managers on speed, dependency resolution, scripting, and real-world sysadmin use cases. Tested in 2026.
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guide
Linux Environment Variables: How to Use Them
Master Linux environment variables: set, export, scope, persistence, and real-world DevOps patterns. Practical commands for sysadmins and engineers.
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guide
Linux Network Configuration Guide
Configure Linux networking with ip, nmcli, and systemd-networkd. Real commands for static IPs, bonding, VLANs, and DNS on RHEL 9 and Ubuntu 24.04.
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guide
Linux Bash Aliases: Speed Up Your Workflow
Master Bash aliases for Linux sysadmins and DevOps engineers. Real commands, alias files, functions, and workflow examples that save hours per week.
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guide
Linux KVM Setup: Virtual Machines Guide
Set up KVM virtual machines on Linux from scratch. Real commands, network config, storage pools, and performance tuning for sysadmins and DevOps engineers.
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guide
Linux sudo Guide: Privileges and Configuration
Configure sudo correctly on Linux: sudoers syntax, privilege delegation, logging, and security hardening with real commands and config examples.
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guide
Linux Swap: How to Manage and Configure It
How to create, resize, and tune Linux swap space in 2026. Covers swapfile vs partition, swappiness, zswap, and production recommendations.
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guide
Linux Memory Management: RAM, Swap, and Cache
Master Linux memory management: understand RAM allocation, swap tuning, page cache behavior, and real commands to diagnose and fix memory pressure in 2026.
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best
Best Backup Tools for Linux Servers in 2025
7 battle-tested Linux backup tools compared with real commands, benchmarks, and config examples. We tested rsync, Restic, BorgBackup, Bacula, and more.
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reference
Linux sed and awk: Practical Examples
Real sed and awk commands for log parsing, config editing, and data extraction. Tested examples with GNU awk 5.x and sed 4.8 on RHEL 9 and Ubuntu 24.04.
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guide
Linux systemd Service File: How to Write One
Write a production-ready systemd service file from scratch. Real unit file examples, directives explained, hardening options, and common pitfalls covered.
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guide
Linux Archive Tools: tar, gzip, zip Guide
Practical guide to tar, gzip, bzip2, xz, and zip on Linux. Real commands, compression benchmarks, and sysadmin workflows for 2026.
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guide
Linux DNS Configuration: resolv.conf Guide
Master Linux DNS config via resolv.conf, systemd-resolved, and NetworkManager. Real commands, real examples, and specific recommendations for sysadmins.
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comparison
Bash vs Zsh Scripting: Differences That Matter
Bash vs Zsh scripting compared for sysadmins: arrays, globbing, regex, portability traps, and where each shell breaks production scripts.
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guide
Linux File System Types: ext4, xfs, btrfs Compared
ext4, xfs, and btrfs benchmarked and compared for real workloads. Pick the right Linux filesystem for databases, containers, and high-throughput storage.
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guide
Linux Boot Process Explained Step by Step
Trace the Linux boot process from BIOS/UEFI to login prompt. Real commands, kernel parameters, systemd targets, and troubleshooting for sysadmins.
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comparison
sudo vs su on Linux: What Is the Difference
sudo vs su compared for sysadmins: privilege escalation mechanics, audit trails, PAM integration, and when to use each in production Linux environments.
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guide
Linux NFS Setup: Network File System Guide
Set up NFS on Linux in 2026: exports config, mount options, performance tuning, and security hardening with real commands and test results.
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guide
Linux btrfs Guide: Snapshots and Subvolumes
Master Btrfs snapshots and subvolumes on Linux. Real commands for setup, layout, send/receive backups, and rollback. Tested on kernel 6.8.
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guide
Linux logrotate: Keeping Log Files Under Control
Master logrotate on Linux: config syntax, rotation schedules, compression, postrotate scripts, and debugging. Real examples for sysadmins and DevOps engineers.
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guide
Linux Backup Strategies: What Actually Works
Real-world Linux backup strategies for sysadmins: rsync, restic, BorgBackup, ZFS snapshots, and offsite replication with tested commands and timing data.
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guide
Linux Containers: LXC and LXD Guide
Run LXC and LXD containers on Linux with real commands, config examples, and networking setup. Tested on Ubuntu 24.04 and Debian 12.
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guide
Linux Samba File Sharing: Setup Guide
Set up Samba file sharing on Linux in 2026. Real smb.conf configs, user auth, AD integration, and performance tuning for sysadmins and DevOps engineers.
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guide
Linux RAID Setup: mdadm Guide
Set up software RAID on Linux using mdadm. Covers RAID 0, 1, 5, 6, and 10 with real commands, monitoring, and failure recovery for production systems.
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guide
Linux Kernel Compilation: Step-by-Step Guide
Compile the Linux kernel 6.x from source on Debian/Ubuntu or RHEL. Real commands, config flags, initramfs setup, and boot verification included.
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guide
Linux Kernel Parameters: sysctl Guide
Tune Linux kernel parameters with sysctl. Real commands, persistent config, networking and memory tuning for production servers. No fluff, no filler.
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guide
Linux Namespaces: The Tech Behind Containers
Linux namespaces isolate PID, network, mount, and more. Learn how containers actually work with real commands and kernel-level examples.
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guide
Linux OOM Killer: How It Works and Tuning
Understand how the Linux OOM killer selects victims, tune oom_score_adj, set memory limits, and protect critical processes from getting killed.
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guide
Linux TCP BBR: Enable and Tune Congestion Control
Enable TCP BBR on Linux in 3 commands, tune queue discipline, verify with ss and sysctl. Real configs tested on kernel 6.x for throughput gains.
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guide
Linux Kernel Modules: Loading and Managing
Load, unload, inspect and manage Linux kernel modules with modprobe, insmod, lsmod and modinfo. Real commands, parameters, and production tips for sysadmins.
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guide
Linux Timezone Configuration: timedatectl Guide
Configure Linux timezones with timedatectl, /etc/localtime, and TZ env vars. Real commands, NTP sync, container edge cases, and sysadmin pitfalls covered.
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guide
Linux LVM Snapshots: Backup Without Downtime
Create LVM snapshots on live Linux systems without downtime. Real commands, sizing math, merge procedures, and automation tips for sysadmins.
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guide
Linux Runlevels and systemd Targets Explained
Map SysV runlevels to systemd targets, switch targets live, write custom units, and manage boot state on RHEL, Debian, and Arch in 2026.
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guide
Linux cgroups: Resource Control for Sysadmins
Control CPU, memory, and I/O per process group with Linux cgroups v2. Real commands, systemd integration, and production tuning for sysadmins.
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guide
Linux Virtual Networking: bridges, vlans, tuns
Set up Linux bridges, VLANs, and TUN/TAP interfaces with real iproute2 commands. Tested on kernel 6.8. Includes netns isolation and VXLAN examples.
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guide
Linux Swap Optimisation: swappiness and zswap
Tune swappiness and enable zswap to cut swap I/O by 60-80%. Real configs, benchmarks, and kernel parameters for production Linux servers.
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guide
Linux File Descriptor Limits: ulimit Guide
Raise Linux file descriptor limits permanently with ulimit, /etc/security/limits.conf, and sysctl. Real commands, tested configs, specific numbers for high-load servers.
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guide
Linux XFS Filesystem: Setup and Best Practices
Set up XFS on Linux the right way. Real commands, mount options, tuning for throughput and IOPS, repair procedures, and production-tested recommendations.
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guide
Linux Namespaces Deep Dive: cgroup, net, pid, mnt
Master Linux namespaces - cgroup, net, pid, mnt - with real commands, kernel internals, and container isolation techniques for sysadmins and DevOps engineers.
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guide
Linux chroot Guide: Jails for Sysadmins
Set up Linux chroot jails for service isolation, rescue ops, and build environments. Real commands, configs, and pitfalls from production use.
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guide
Linux ss Command: Socket Statistics Guide
Master the ss command on Linux: filter by state, port, process, and protocol. Real examples for sysadmins replacing netstat in 2026.
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guide
Linux Huge Pages: Configuration and Use Cases
Configure Linux huge pages for PostgreSQL, Redis, and JVMs. Real commands, benchmark numbers, and kernel tuning for sysadmins who need results.
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guide
Linux Network Namespaces: Isolation Guide
Master Linux network namespaces with real commands: create isolated stacks, wire veth pairs, bridge containers, and debug with ip netns. Tested on kernel 6.8.
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guide
Linux I/O Schedulers: Which to Use and When
Pick the right Linux I/O scheduler for your workload. Real benchmarks, sysfs commands, and specific recommendations for NVMe, SSD, and spinning disk.
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guide
Linux CPU Governors: Power vs Performance
Configure Linux CPU governors for real workloads. We tested all 6 governors across idle, burst, and sustained load. Here's what actually works.
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guide
Linux Network Bonding: Redundancy Guide
Configure Linux network bonding for HA and failover. Real commands for LACP, active-backup, and balance-rr modes on RHEL 9, Ubuntu 24.04, and Debian 12.
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guide
Linux Transparent Huge Pages: Performance Impact
THP can cut memory overhead 40% or destroy latency. Learn when to enable, disable, or tune Transparent Huge Pages on Linux with real benchmarks.
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guide
Linux Reproducible Builds: Security Practice
Learn how to implement Linux reproducible builds in 2026. Real commands, tooling, and verification steps for sysadmins and DevOps engineers.
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