Linux

Articles about Linux administration, command line tools, servers, and open source software.

Apache, PHP 8.3 FPM and MariaDB 11 on FreeBSD 14 — June 15, 2026
How to install Apache 2.4 Event MPM, PHP 8.3 FPM and MariaDB 11 on FreeBSD 14 using pkg
WireGuard — set up a VPN on Linux in minutes — June 14, 2026
How to install and configure WireGuard on Linux to create a fast, modern VPN between a server and one or more clients
How to self-host your email server with Mailcow — May 29, 2026
Step by step guide to host your own email server with Mailcow and Docker
Ten useful Docker commands — July 29, 2020
Ten useful Docker commands
Arch Linux, Aur error - FAILED unknown public key — July 9, 2020
How to solve Arhc Linux problem of FAILED unknown public key
How to add a second private key to ssh in Linux — July 6, 2020
How to add a second private Key to Linux server to log using ssh
How to install Wallabag on Ubuntu using SQLite — July 4, 2020
How to install Wallabag on Ubuntu Linux with Nginx and SQLite
How to list the active cronjobs in Linux — June 2, 2020
How to list active cronjobs in Linux
How to create users in Linux with useradd — May 31, 2020
How to create Linux users with useradd
How to add a new service to systemd — May 31, 2020
How to add a new service to systemd
Install from Debian backports — May 23, 2020
How to enable Debian Backports
Install old ruby 2.3.x on latest Ubuntu 20.04 — May 22, 2020
How to install ruby 2.3.3 on Ubuntu 20.04
Install Zoom on Ubuntu — May 21, 2020
How to install zoom on Ubuntu Linux
How to install pip on Ubuntu — May 20, 2020
How to install python pip on Ubuntu Linux
Access WSL Linux files from Windows 10 Explorer — May 20, 2020
How to access WSL files from Windows 10
Create python virtual environment — May 20, 2020
How to create virtual environment for Python on Ubuntu Linux
Install NodeJS on Ubuntu — May 19, 2020
How to install NodeJS on Ubuntu
Install ruby on Ubuntu 20.04 — May 16, 2020
How to install ruby on Ubuntu 20.04 with rbenv
sshd: no hostkeys available -- exiting — May 11, 2020
Error: sshd: no hostkeys available -- exiting
How to password protect a file in Linux — May 9, 2020
How to password protect a file in Linux
How to install Brackets on Ubuntu — May 1, 2020
How to install Brackets on Ubuntu
How to upgrade Ubuntu LTS, Bionic to Focal — May 1, 2020
How to upgrade from Ubuntu 18.04 LTS to 20.04 LTS
Apache in a Docker container — April 9, 2020
How to have a running Apache server in a Docker container
rsync — April 5, 2020
rsync guide, how-to and tips
Linux command line spotify player — April 5, 2020
How to listen to music from Linux command line whith low memory use
Logrotate — March 31, 2020
Everything about logrotate on Linux
Undo and redo on vim — March 30, 2020
Undo and redo on vim
htacces, remove trailing slash — March 30, 2020
How to remove the trailing slash with .htaccess file
Install ncurses on Ubuntu or Debian Linux — March 29, 2020
How to install ncurses library on Ubuntu or Debian Linux
How to use wget in Linux — March 29, 2020
Different uses of wget
What version of Ubuntu do I have? — March 28, 2020
How to know what version of Ubuntu I am running
pkill linux command explained — March 20, 2020
pkill linux command explained
Recursively delete files with find and rm — March 1, 2020
How to find and delete files according to a criteria
Delete a directory in Linux — March 1, 2020
Delete a directory in Linux even if not empty
Installing ruby on Ubuntu using rbenv — February 23, 2020
How to install ruby on Ubuntu Linux using rbenv
sudo vs su — June 8, 2019
When should you use su and when should sudo be used instead
Your own CDN — April 3, 2015
Create your own CDN using VPS on strategically located Data Centers and AWS Route 53 DNS service
Nginx Reverse Proxy. Multiple Applications on One Domain — March 29, 2015
How to use Nginx as reverse proxy to serve multiple applications from the same domain on the same host or different one
Wordpress on Nginx upload size limit — March 8, 2015
Increase Wordpress upload size limit for Nginx and PHP-FPM
Apache, PHP-FPM, MariaDB and FreeBSD — February 1, 2015
Apache MPM Event, PHP-FPM and MariaDB on FreeBSD
Starting with FreeBSD — January 14, 2015
First steps with FreeBSD on Digital Ocean, installing some useful tools to work with the server
Wordpress Cluster Powered — December 21, 2014
How to setup a cluster of PHP-FPM servers to power a Wordpress Installation with Nginx doing reverse proxy and cache in front of them
Classify Email with Fetchmail, Procmail and Postfix — September 7, 2014
How to collect email from multiple accounts and clasify it, and resend to a new account or mailbox using Fetchmail, Procmail and Postfix
Which version of Ubuntu am I running? — August 23, 2014
How to determine the version of Ubuntu you are running
Your Own Password Manager — August 16, 2014
How to manage your passwords with Linux and Open Source software
Happy Birthday Debian — August 16, 2014
Celebrating Debian 21st Anniversary
First week with Elementary Luna. Review of the best Ubuntu based distribution — August 26, 2013
One week with Elementary Luna, Review of the Ubuntu 12.04 based GNU/Linux distribution, with a great look, nothing to envy to Windows or Mac OS X
Apache MPM Worker and PHP-FPM on CentOS — July 13, 2013
How to install Apache MPM Worker and PHP-FPM with MySQL on Centos. And at the same time configure PHP-FPM to listen on a socket instead of a TCP port.
Crontab and cron job — June 26, 2013
Crontab, cron job how to, and example. How to take advantage of cron jobs for repetitive tasks in Unix like system, like GNU/Linux
Debian vs CentOS — June 4, 2013
Your best option to power your web server. Comparing CentOS and Debian as your options for web server operating systems. Considering stability, easy of use, fresh package availability
Linux add a second IP address, permanent or temporary — May 24, 2013
Linux add a second IP to Linux machines, both temporary and permanent IPs
Ubuntu Network Speed and full or half duplex LAN — May 9, 2013
How to change network speed 10, 100 or 1000 and duplex from half to full for LAN in Ubuntu
Django, virtualenv and Python in Ubuntu — May 9, 2013
How to install Phyton, virtualenv, virtualenvwrapper and Django in Ubuntu
Install KVM on Ubuntu — February 2, 2013
How to install KVM virtual server machine emulator on Ubuntu
Install cacti on Ubuntu Server with Apache and PHP-FPM — January 27, 2013
How to install cacti on Ubuntu server with Apache or Nginx and PHP-FPM PHP-CGI
Apache2 configure custom 404 page not found error page — January 11, 2013
How to configure Apache2 to display custom 404 page not found error page
Varnish logs analized with awstats | Multiple virtual servers — January 6, 2013
Install awstats to work with varnish logs, generated with varnishncsa. Working with multiple virtual servers on Ubuntu Linux
Dual boot with two Linux distributions — December 29, 2012
Dual boot Linux, two distributions, sharing partition scheme for sharing documents
How much swap memory is enough? — December 18, 2012
How much swap memory for Linux?
Debian, Ubuntu and Arch Linux triple boot — December 11, 2012
How to make Debian os-prober and update-grub find Arch Linux partition
Boot an ISO from your hard disk — December 3, 2012
How to boot from an ISO in your disk
UberWriter | Ubuntu's Markdown Editor review — December 1, 2012
UberWriter Ubuntu's best writing application for Markdown reviewed
Take advantage of gnu-screen — December 1, 2012
How to take advantage of gnu-screen when working on remote servers
Please Support Open Source Projects — November 28, 2012
Why support is so important for the FOSS community
Shutter: Taking screenshots in Ubuntu Linux — November 27, 2012
Using Shutter to take screenshots in your Ubuntu or any other Linux distribution
Ubuntu fails to select the closest mirror — November 22, 2012
Ubuntu fail in selecting the fastest or closest mirror when not in U.S.
Install Wordpress on Ubuntu Server — November 22, 2012
How to install Wordpress on Ubuntu server, the easy way
On Netflix for Linux — November 18, 2012
Netflix on Linux, now work using Wine, not yet a native application for Linux comming
My iftop's config file — November 8, 2012
How I use iftop to monitor network traffic, and an example of my config file and options
Arch Linux switched to Systemd and finish support for initscripts — November 4, 2012
Arch Linux switched to Systemd
Upgrade Debian 6.0 Squeeze to 7.0 Wheezy — August 14, 2012
Step by step how-to, to upgrade your Linux Debian Squeeze to Wheezy (6.0 to 7.0). Using apt-get on the terminal
nmap | Port scan tool for .nix systems | nmap GUI interfaces for Linux and Mac — July 3, 2012
Some nmap examples in the terminal, as well as some graphical front ends and GUI interfaces you can install on Linux and Mac OS X powered systems
Take Control of your Linux | sudoers file: How to with Examples — May 22, 2012
Using visudo to edit sudoers file, so you can control your Linux with sudo command | bonus: Set nano or vim as default editor
KISS simplicity: Arch Linux — May 21, 2012
Arch Linux in-deep review
Nginx, PHP-FPM, APC, Varnish and Wordpress — April 27, 2012
Make Wordpress fly with Nginx, PHP-FPM, APC and Varnish
Wordpress Performance Comparison: Using Nginx, Apache, APC and Varnish in Different Scenarios — April 27, 2012
Tests and results of Wordpress running on Apache with APC and Nginx with APC, final using Varnish as reverse Cache for Wordpress
How to: Purge, Flush or Delete Postfix Queue, or a Single Email — April 25, 2012
how to flush email queue from a shell prompt under UNIX / Linux operating system, using postfix
Set Time, Date Timezone in Linux from Command Line or Gnome | Use ntp — April 19, 2012
Set time and date in bash Linux or Gnome, also Hardware clock, and set the Timezone
iptables: Small manual and tutorial with some examples and tips — April 18, 2012
Small iptables manual, with tips and examples
Optimize VPS server for Drupal Hosting | Using Varnish — April 8, 2012
How to optimize VPS for Drupal hosting
Run a program or script every 5 or X minutes or hours — April 7, 2012
How to run a program every X minutes of hours using cron
Resize Windows in Gnome when Margin is Out of Boundaries — April 2, 2012
How to resize a window when the margin is out of boundaries
How to Sync, Put or Pull from Linux to Amazon S3 — March 30, 2012
Command line Amazon S3 put, pull, copy and sync
Configure Postfix to Relay on Gmail on Linux — March 16, 2012
Configure Postfix to relay outbound email through Gmail on Linux
Happy Birthday Arch Linux — March 14, 2012
Arch Linux Turns 10
Use incron to Trigger Action when File Changes — March 12, 2012
Sync folder when changes occur, you may use this to backup to Dropbox every time a file change
Find and Copy Files using bash find -exec Command — March 5, 2012
Find and copy files with find exec command in Linux - Mac - Bash
Find Differences Between Folders and Files Recursively — February 29, 2012
Check differences between folders with diff
Turn Off Ubuntu Automatic Updates — February 25, 2012
How to stop or turn off Ubuntu automatic update
Install Software in Arch Linux from Source, using AUR or ABS — February 22, 2012
How to Install software in Arch Linux from sources using AUR or ABS
Hibernate Notebook When the Lid is Closed — February 19, 2012
How to configure Ubuntu with Gnome Shell to hibernate when the lid is closed
Firewalld is not running: Network printer detection needs... "Error in Ubuntu" — February 18, 2012
Error configuring printer: Firewalld is not running error on Ubuntu
First impression of Ubuntu with Unity — February 16, 2012
Ubuntu 11.10 with Unity, first impressions
Exclude folder from rsync backup — February 8, 2012
How to exclude folders from backup using rsync
Mount a DVD movie ISO file — February 7, 2012
How to mount and play a DVD image: ISO file
Convert PDF files to JPG using imagemagick — January 12, 2012
How to convert a pdf file to jpg, using imagemagick
Which video card do I have? — January 7, 2012
A how to about the way to find the video card you have
How to set up an OpenVPN server and client on Linux — January 7, 2012
Step-by-step guide to setting up an OpenVPN server and client on Linux using Easy-RSA 3, with modern cipher settings and systemd
Nginx, Logrotate and Gentoo: Infinite loop problem and solution — December 25, 2011
Nginx, Logrotate and Gentoo
4 Reasons to Have Live Linux at Home — October 10, 2011
Four reasons to have a Live CD of Linux at Home
One Liner Remove Offending Key sed — September 18, 2011
How to remove offending key ssh login
Find which package contains a specific file — September 4, 2011
Find which package owns a library or contains it
Google Chrome OS Ready for Prime Time — September 2, 2011
Reviewing Google Chrome OS, is Chrome OS ready for prime time?
18+ Million Hits per Day with 120 Mega Bytes RAM, on a Small Linode — August 31, 2011
Almost 20 million hits per day on a small VPS, using static blog
Almost Everything You Need to Know about Charset Encoding, UTF-8, ISO-8859. Conversion and More — August 30, 2011
Everything you need to know about html charset encoding, convert, create and display
The Perfect Tools for the Linux Geek's Blog — August 29, 2011
Perfect blogging tools: Gentoo, Nginx and Jekyll
Enable IPv6 in Nginx — August 26, 2011
How to enable IPv6 with NGINX
Increase Swap Memory in Linux — August 26, 2011
How to increase Swap Memory in Linux
How to enable gzip compression in Apache 2.x — August 24, 2011
How to enable gzip compression in Apache 2.x with mod_deflate
General error: 1030 Got error 134 from storage engine — August 24, 2011
General error: 1030 Got error 134 from storage engine
Use Giver to share files in a local network environment — August 21, 2011
Share files in a local network with Giver
How a Linux Distribution Review Should be Done — August 19, 2011
How a Linux distribution review should be done, and what it should include
Why and how I migrated from Drupal to Jekyll — August 13, 2011
The story of my migration from Drupal to Jekyll
Use a cookie free domain to serve static content with Nginx — August 11, 2011
Enable a cookie free domain to serve static content with Nginx
Image type and size from the Linux command line — August 1, 2011
Find the size of an image from Linux command line
Moving Go2Linux — July 31, 2011
Moving the blog
Nginx remove trailing slash — July 30, 2011
Nginx remove trailing slash
Add a line to a specific position in a file using Linux sed — July 30, 2011
Adding line to files in Linux, to an specific line position, using a shell script