System Administration

Articles marked as System Administration are usually geared towards Linux security, networking, server configuration, virtualization, and similar topics.

 

At Linux Nightly, we’re always auditing our Linux servers and desktops, and looking for ways to improve performance and security. In these guides, we share some of the helpful things we’ve learned.

Allow Port Through Firewall in Ubuntu 20.04

Ubuntu comes with ufw (uncomplicated firewall) installed by default. This is a frontend for iptables/nftables, the built-in Linux firewall, and is meant to make firewall management a bit easier. In this guide, you’ll see how to add rules to the firewall to open ports and allow certain services to have access through the firewall on …

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How to Disable (or Enable) Firewall in Ubuntu 20.04

Ubuntu comes with ufw (uncomplicated firewall) installed by default. This is a frontend for iptables/nftables, the built-in Linux firewall, and is meant to make firewall management a bit easier. Stop/Disable Firewall in Ubuntu If you find the Ubuntu firewall interfering with connections on your system, one option is to disable the firewall completely. Warning: it’s …

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Download Linux

The links below will take you directly to the download pages of some of the most popular Linux distributions. All distros in this list are completely free to download and use. Not sure which one to choose? Check below the link table to find out more about each distribution and to learn about Linux in …

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Kill Processes in Linux – Kill, Pkill, Killall Commands

The kill, pkill, and killall commands are used to terminate processes on a Linux system. They are default command line utilities that all pretty much do the same thing, but in different ways. Mastering these commands will allow a Linux user to exercise more control over their system, as they’ll have the ability to end …

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How to Install AlmaLinux

AlmaLinux is an RHEL-based Linux distro that debuted in 2021 as a direct replacement to CentOS, which has now become CentOS Stream. It’s an enterprise-grade operating system that’s ideal for servers and production environments. Best of all, it’s free. This guide will show the step by step instructions to install AlmaLinux. You can follow these …

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