Linux Server Administration

Take control! This is your central resource for Linux server administration. Whether you are logging in for the first time or performing advanced troubleshooting, these guides are designed to help you. You’ll find step-by-step instructions to perform essential tasks, from adding new users and granting sudo permissions to installing and configuring software like Apache, NGINX, or PHP. If you are solving a problem, you will learn how to check your server’s load, manage system services, or find common error logs. From automating tasks with cron to securing your server with SSH keys, these articles will empower you to manage your environment confidently.

Linux Server Administration Articles

146 results

This section provides articles and resources for Linux server administration. The topics cover server management, security, and optimization.

Troubleshooting Apache startup error: no space left on device

Learn to fix the Apache startup error “Failed to set a watch for httpd.service’s PID file: No space left on device” by checking disk space or increasing inotify watches.
Read more: Troubleshooting Apache startup error: no space left on device
Troubleshooting Guide: PHP-FPM and max_children

Fix slow sites by troubleshooting PHP-FPM max_children on cPanel, Plesk, & InterWorx. Learn to find logs, adjust settings safely, & check server resources.
Read more: Troubleshooting Guide: PHP-FPM and max_children
Understanding and Using systemd

Modern Linux service management with `systemd`. Learn `systemctl` to start, stop, enable & check services. Intro to `journalctl` logs.
Read more: Understanding and Using systemd
Understanding Ioncube loader

Learn what Ioncube Loader is, how applications like WHMCS use it, and why matching the correct Loader version with your server’s PHP version is crucial.
Read more: Understanding Ioncube loader
Understanding lsof

lsof lists open files, network connections, and processes. Essential for troubleshooting ports, finding resource hogs, and monitoring activity.
Read more: Understanding lsof
Updating Your Linux Kernel

The kernel is the core of the Linux OS. You may need to update it for software compatibility or to patch security vulnerabilities in older versions.
Read more: Updating Your Linux Kernel
Upgrading or Installing PHP on Ubuntu 22.04

Upgrade PHP on Ubuntu 22.04 for better security & performance. This guide covers installation, Apache configuration, and managing PHP modules.
Read more: Upgrading or Installing PHP on Ubuntu 22.04
Use Tar, Gzip & Zip in Linux

Learn how to decompress `.gz` and `.tar.gz` files in Linux. Our guide also covers the key differences between `TAR`, `GZ`, `TGZ`, and `ZIP` file formats.
Read more: Use Tar, Gzip & Zip in Linux