All Articles
Browse all Linuxize tutorials, guides, and references.
How to Install Ansible on Ubuntu 26.04 and Write Your First Playbook
Step-by-step instructions for installing Ansible on Ubuntu 26.04, configuring an inventory, and running your first playbook against remote hosts over SSH.
How to Set Up Automatic Kernel Updates on Linux
Set up automatic, rebootless Linux kernel updates with live patching from Canonical Livepatch (Ubuntu Pro), and learn when unattended upgrades are enough.
How to Fix the WordPress White Screen of Death
Troubleshoot the WordPress White Screen of Death by using Recovery Mode, disabling plugins and themes, checking PHP errors, raising memory limits, and restoring access.
What Is an SSL/TLS Certificate and How Does It Work?
An SSL/TLS certificate proves a website's identity and encrypts traffic between the browser and the server. This guide explains how certificates work, what they contain, and the types available.
How to Use OpenSSL: Generate Keys, Certificates, and Test TLS
Practical OpenSSL guide for Linux: generate private keys, create CSRs and self-signed certificates, convert formats, inspect certificates, and test TLS connections.
npm Command: Install and Manage Node.js Packages
This npm command guide covers project setup, local and global package installs, npm ci, updates, dependency removal, scripts, and one-off package runs.
Fix "sudo: command not found" on Linux
How to fix the 'sudo: command not found' error on Linux by installing the sudo package, adding your user to the right group, and recovering from a broken PATH.
Podman vs Docker: Differences and Migration Guide
This guide compares Podman and Docker across architecture, rootless containers, systemd integration, Compose workflows, image builds, and migration planning.
How to Back Up and Restore MySQL Databases with Mysqldump
Step-by-step guide to backing up and restoring MySQL and MariaDB databases using the mysqldump utility. Covers single and full backups, compressed backups, restoring dumps, and automating backups with cron.
chgrp Command in Linux: Change File Group Ownership
The chgrp command changes the group ownership of files and directories in Linux. This guide covers syntax, recursive changes, symlink handling, and practical examples.
tr Command in Linux: Translate, Delete, and Squeeze Characters
The tr command translates, deletes, and squeezes characters from standard input. This guide covers tr syntax, character sets and ranges, case conversion, removing line endings, and practical pipeline examples.
iptables Command in Linux: Manage Firewall Rules
Manage Linux firewall rules with iptables. This guide covers tables and chains, listing rules, allowing and blocking ports and IP addresses, setting default policies, and saving rules across reboots.
Bash: Check if String Contains Substring
Four ways to check if a string contains a substring in Bash: wildcard matching, the case statement, the regex operator, and grep. Includes examples and a Quick Reference.
Network Bandwidth Monitoring Tools: iftop, nload, bmon, and vnstat
Compare nload, iftop, bmon, and vnstat for checking Linux network bandwidth in real time and tracking historical traffic usage.
Bash set Command: set -e, set -x, and set -u Explained
How the bash set builtin changes shell behavior, with practical examples of set -e to exit on errors, set -u to catch unset variables, set -x to trace execution, and pipefail.
nslookup Command in Linux: Query DNS Records
The nslookup command queries DNS servers for domain records. This guide covers A, MX, NS, TXT, and AAAA lookups, reverse DNS, interactive mode, and choosing a specific name server.
whois Command in Linux: Query Domain Registration Info
The whois command looks up domain registration, registrar, name server, expiry, IP allocation, and AS number details from Linux.
How to Revert a Commit in Git
Use git revert to safely undo changes from a previous commit by adding a new commit that reverses them, without rewriting pushed history.
How to Install and Use Zsh on Ubuntu
Install Zsh on Ubuntu, set it as the default shell, configure ~/.zshrc, and add Oh My Zsh themes and plugins for daily terminal work.
Bash Arithmetic: Integer and Floating-Point Math
How to do arithmetic in Bash with the (( )) operator, $(( )) expansion, the let builtin, and bc or awk for floating-point math the shell cannot do natively.
