The hostname identifies your server on a network and appears in shell prompts, log files, and monitoring dashboards. Ubuntu 24.04 LTS uses hostnamectl to view and change it persistently. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges Step 1 – Check the Current Hostname Display the […]
SSH key authentication is far more secure than password-based login. A cryptographic key pair — private key on your machine, public key on the server — lets you connect without a password and protects against brute-force attacks. This guide covers generating a key pair and deploying it on Ubuntu 26.04 LTS. Tested and valid on: […]
Accurate system time is critical for SSL certificates, logs, cron jobs, and distributed systems. Ubuntu 24.04 LTS uses systemd-timesyncd as the default NTP client. This guide shows you how to configure and verify time synchronisation. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges Internet connectivity Step […]
The hostname identifies your server on a network and appears in shell prompts, log files, and monitoring dashboards. Ubuntu 26.04 LTS uses hostnamectl — a systemd utility — to view and change the hostname persistently without a reboot. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS server A user with sudo privileges […]
unattended-upgrades automatically downloads and installs security updates so your Ubuntu 24.04 LTS server stays protected without manual intervention. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges An email address for notifications (optional) Step 1 – Install unattended-upgrades Install or confirm the package is present: sudo apt […]
Accurate system time is critical for SSL certificates, logs, cron jobs, and distributed systems. Ubuntu 26.04 LTS uses systemd-timesyncd as the default NTP client. This guide shows you how to configure it, verify time synchronisation, and optionally switch to a different NTP server pool. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS […]
Swap space extends the effective memory of a Linux server by using disk space as overflow RAM. This guide creates and configures a swap file on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges Sufficient free disk space (at least 1–2 GB) Step […]
Security vulnerabilities are patched regularly in Ubuntu’s package repositories. unattended-upgrades automatically downloads and installs security updates — and optionally all updates — so your server stays protected without manual intervention. This guide configures it on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS server A user with sudo privileges […]
Knowing how your server uses CPU, memory, disk, and network is essential for capacity planning and troubleshooting. This guide covers the most useful monitoring commands and tools on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with sudo privileges Step 1 – Quick Overview with top […]
Swap space extends the effective memory of a Linux server by using disk space as overflow memory. While not a substitute for RAM, it prevents out-of-memory crashes on servers that occasionally spike in memory usage. This guide creates and configures a swap file on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites […]
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