All Articles
Browse all Linuxize tutorials, guides, and references.
Nginx 413 Request Entity Too Large: client_max_body_size Fix
Fix the Nginx 413 Request Entity Too Large error: raise client_max_body_size in the right context and match the PHP-FPM upload limits.
ssh Command in Linux: Connect to Remote Servers
The ssh command connects you to a remote Linux server. This guide covers its syntax, the most useful options, key-based login, and port forwarding.
less Command in Linux: Navigate and Search Files
How to use the less command in Linux to view files page by page, search for text, follow log files in real time, and navigate with vi-style key bindings.
Things to Do After Installing Ubuntu 26.04
Post-install checklist for Ubuntu 26.04: updates, drivers without Software & Updates, media codecs, Flatpak, backups, Ubuntu Pro, firewall, and desktop tweaks.
How to Find Which Process Is Using a Port in Linux
Find the Linux process listening on a TCP or UDP port with ss, lsof, fuser, or netstat, then inspect and stop it safely.
Fix pip "externally-managed-environment" Error on Ubuntu and Debian
Fix pip's externally-managed-environment error on Ubuntu and Debian with a virtual environment, pipx, or apt, without changing the system Python packages.
How to Save a File and Exit Vim / Vi
Save a file and quit Vim or Vi with :w, :wq, :q!, :x, ZZ, and ZQ. This guide explains the common save, exit, discard, and read-only file commands.
How to Unzip Files in Linux
Extract ZIP archives in Linux with the unzip command: unzip to a folder, handle password-protected and multiple archives, list or test contents, and exclude files.
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.
zip Command in Linux: Zip Files and Directories
Create ZIP archives in Linux with the zip command. Zip directories recursively, exclude files, add a password, and split large archives.
jq Command: Process JSON from the Terminal
How to use the jq command to read, filter, and transform JSON on the command line, from selecting fields to building new objects and parsing API responses.
passwd Command in Linux: Change User Passwords
Change your own, another user's, or the root password in Linux with the passwd command. Covers password expiry with chage, forcing a change at next login, and account locking.
Linux Folder Size: How to Check File and Directory Sizes
Check folder and file sizes in Linux with du. Compare directory totals, rank subdirectories, exclude paths, and check free space with df.
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.
How to Generate a Random Password or String in Linux
Generate random passwords and strings in Linux with openssl rand, /dev/urandom, pwgen, and Python. Choose hex, Base64, URL-safe tokens, or passphrases.
How to Install Java on Ubuntu 26.04
Install OpenJDK 25, the Ubuntu 26.04 default, or Oracle JDK 25 and 27. Also covers other OpenJDK versions, switching between them, and JAVA_HOME.
apt vs apt-get: The Difference and When to Use Each
apt and apt-get are not the same tool: apt is built for interactive terminal use, apt-get for scripts and automation. Compare their commands and see when to use each.
Fix SSH "Too Many Authentication Failures" Error
Fix SSH 'Too many authentication failures' by selecting the right key with IdentitiesOnly, skipping keys for password login, and checking MaxAuthTries.
How to Change a Git Remote's URL
Change a Git remote URL with git remote set-url, switch between HTTPS and SSH, set separate push and fetch URLs, and verify the change.
Python Switch Case Statement (match-case)
Learn how to use Python's match-case statement (structural pattern matching) as a switch-case equivalent. Covers if-elif-else, dictionary lookup, and match-case with examples.
