Ubuntu

Ubuntu installation, desktop and server setup, package management, and troubleshooting.

Sep 11, 2026 • 6 min read

How To Create a Sudo User on Ubuntu

Create a sudo user with a home directory on Ubuntu 22.04, 24.04, or 26.04 using adduser and usermod, then verify the account has sudo access.

Sep 10, 2026 • 10 min read

How to Add a User to Sudoers in Ubuntu

Grant sudo privileges in Ubuntu by adding a user to the sudo group or editing the sudoers file. Step-by-step examples and common errors.

Sep 10, 2026 • 7 min read • series

How to Enable SSH on Ubuntu

Enable SSH on Ubuntu by installing OpenSSH Server, checking the correct systemd unit, allowing it through UFW, and connecting from Linux, macOS, or Windows.

Sep 9, 2026 • 8 min read • new

How to Fix APT and dpkg Lock Errors on Ubuntu and Debian

Resolve APT and dpkg lock errors safely on Ubuntu and Debian by finding the process holding the lock and repairing interrupted package operations.

APT and dpkg package operations waiting at a shared package lock

Aug 26, 2026 • 11 min read

How to Add APT Repository in Ubuntu

Add APT repositories in Ubuntu using add-apt-repository, the signed-by method, and PPA. Includes the DEB822 format used by default on Ubuntu 24.04 and 26.04.

Adding an APT repository on Ubuntu using add-apt-repository

Aug 21, 2026 • 6 min read

Initial Server Setup on Ubuntu 26.04

Prepare a new Ubuntu 26.04 server with a sudo user, SSH key authentication, UFW firewall rules, a hostname, timezone settings, and system updates.

Aug 11, 2026 • 7 min read

How to Install Node.js and npm on Ubuntu 26.04

Install Node.js 24 LTS or the current Node.js 26 release on Ubuntu 26.04 using NodeSource, nvm, or the default Ubuntu packages.

Aug 11, 2026 • 7 min read

How to Install Node.js and npm on Ubuntu 24.04

Install Node.js 24 LTS and npm on Ubuntu 24.04 with apt, the NodeSource repository, or nvm, including upgrade and uninstall steps.

Aug 5, 2026 • 9 min read

How to Install Python on Ubuntu 24.04

Install Python on Ubuntu 24.04 using the default Ubuntu packages, the deadsnakes PPA for newer versions, or a source build. Includes pip and virtual environments.

Aug 4, 2026 • 6 min read

Install deb Files on Ubuntu: apt, dpkg, and gdebi

Install local .deb files on Ubuntu with apt, dpkg, or gdebi. Fix dependency errors, inspect packages, install via GUI, and remove them safely.

Jul 31, 2026 • 10 min read

apt Command in Linux

The apt command manages packages on Ubuntu, Debian, and related distributions. This guide covers the essential commands for installing, upgrading, removing, and searching packages.

Jul 29, 2026 • 4 min read

How to Set or Change Timezone on Ubuntu Server and Desktop

Check the current time zone on Ubuntu and change it permanently with timedatectl, or switch it from the Date & Time panel on Ubuntu Desktop.

Jul 29, 2026 • 13 min read

How to Install Ubuntu 26.04

Step-by-step instructions for installing Ubuntu 26.04 from a bootable USB drive, covering ISO download, installer screens, disk setup, and first boot.

Jul 29, 2026 • 10 min read

How to Install Kubernetes with kubeadm on Ubuntu 26.04

Install Kubernetes 1.36 on Ubuntu 26.04 with kubeadm and containerd, configure Flannel networking, join worker nodes, and verify the cluster.

Kubernetes control plane and worker nodes installed with kubeadm on Ubuntu 26.04

Jul 27, 2026 • 7 min read

How to Upgrade to Ubuntu 26.04

Upgrade Ubuntu 25.10 or 24.04 LTS to Ubuntu 26.04 Resolute Raccoon, including the early command-line path before the 26.04.1 point release.

Jul 27, 2026 • 6 min read

How to Install PHP on Ubuntu 26.04

Learn how to install PHP 8.5 on Ubuntu 26.04 with Apache or Nginx. Includes PHP-FPM setup, common extensions, and installing other PHP versions.

Jul 27, 2026 • 6 min read

How to Install Docker on Ubuntu 26.04

Install Docker on Ubuntu 26.04 from the official Docker repository. Covers repository setup, verification, running without sudo, updates, and uninstall steps.