The Coding Cat has tricked you! The best OS for programmers is of course Linux!



So in this article it will show you 10 reasons why Linux is the best operating system for programmers.


1. Linux is not as easy to maintain as other OS’es.

Someone would think this is a bad thing. Well, not for programmers. With Linux you have to think more while configuring or installing (not apt-get, yum etc.) new programs and features. When something breaks, you can spend hours browsing the internet on the right solution. And the most important part here – you learn new things! Windows or OSX makes developers lazy. They are just calling the support, reinstalling the whole Windows, or buying a brand new Mac.

2. In Linux you are the owner of your computer

You can change everything as you want. Wanna totally different interface looks? No problem! Just install different desktop environment like Xfce or KDE and set up everything as you wish. Some process is not responding, eating too much your resources, or you just want to kill it for no reason? Type “kill <pid>” or “killall <name>” and get rid of it instantly.

3. Workspaces


This is one of the Coding Cat’s favourite features. You can work simultaneously on different subjects, just only switching to different workspace. For example in the first workspace you have your project’s code editors on second there is some operation running that require many windows for monitoring and third is your coffee-break workspace, where you read the Coding Cat’s blog while having a break. The Coding Cat has three monitors and six workspaces set up, that gives him 18 different screens!

4. Terminal


In Linux, everything can be done using terminal. You don’t have to go clicking through the jungle of windows when you want to change or check something in your system. Ctrl+alt+t and there you go. All file operations, installing software, checking your computer resources consumption etc. If you want a article about most useful Linux commands, leave a comment here.

..And this is how it looks like in Windows:

Working with windows


Want to run some of your scripts every hour, every two minutes or only sunday at 22PM? Type “crontab -e” in your terminal, and put here your command. As simple as that. Well, there are also some wisest Windows wizards, that can set up this also in their OS. But only check yourself some tutorials on that – you’ll see how f** is that.

6. Customization trough Bash and scripting

You can customize everything with scripting. Don’t like some part of your system, want to change some behavior or add automated features yourself? Linux is open for everything you need.

Psst. want to setup your wallpaper that has a lot of useful information instead of only a picture, and doesn’t consume system resources? Like this:

Linux custom wallpaper with varialbes

That’s very easy to set up. If you wish tutorial about that, leave a comment.

7. Installation from software repositories

When you want to install something on Windows, you have to open your Internet Explorer, then go to some website, download some fishy exe file, and pray, that this is not some malware like WannaCry. In Linux, on most popular programs, just type “apt-get install <name>” (distro dependent), and you’ll get your soft from a secure place. The other benefit from that is you can automate installation of programs you like, in a very easy way. If for example you change your computer often, or have to install the same things on different machines, just create a Bash script that installs everything in one command.

8. Security and encryption

Linux has a lot better user privileges on files resolved than Windows. You don’t need there a heavy antivirus software army that keeps your computer safe and consumes a half of your CPU while scanning trough everything. In Linux, you can set up whole partition encryption, and then your home folder encryption, so your most important code can be encrypted twice by default!

9. Linux servers

Most of the internet runs on Linux servers. If you get familiar with this system on your desktop, it’ll be easier for you to manage servers where you run your projects.

10. Prestige

how they see you

When some programmer asks you: “Which Windows do you have installed on your PC?” and you respond “Linux“, you are like some black magic wizard and Anonymous hacker to him, at the same time. And when he starts complaining, how his Windows is bad and slow, and how last time someone hacked his webcam, you redirect him to this blog post, so he can change his OS, before it’s too late.

Offtopic – Mr. Robot

If you like Mr. Robot series, you must check their website, is the best website made by humans that the Coding Cat has ever seen!

This is a website:

Mr robot website screenshot - koala article is simple web app for pranking your friends, choose any wikipedia article and edit it as you want using an WYSIWYG editor. It is using domain with similar letters, instead of you get wíkí Most people wont notice that little change, and will get pranked. In this article, the Coding Cat will explain how this works.



  1. Go to you should see screen like this: start screen
  2. Paste here any original wikipedia url, for example “” and click “Edit” button
  3. Now you should see editor, you can edit anywhere inside red border. Just click and type. 
  4. When you are ready, click “Save & Get link” at top-right of the page - edit article
  5. Copy url from “Your url” field, and send it to your friend, or click Facebook / Twitter icon to share

How does it work from the code side?

You can edit any website inside your browser, just use javascript code in your console like:


Buttons from toolbar can be simple made by ‘document.execCommand’ method. For example to format selected text as a H1 heading:


Ok, but how to the modified content is saved?

It’s just simple as sending document.body.innerHTML to the server and save into the database. In the URL, after “:” there is a little letter. This is the ID parsed in a-zA-Z so it is less suspicious. Based on that ID content is fetched from database and parsed on the website.

Enter your domain name here:

This blog post will be parametrized for your case

Why installing SSL certificate?

SSL certificate is used for encrypting the data transfered between your website and it’s visitors. It encrypts all the data, including passwords, credit cards, files, preventing others from reading them. Nowadays browsers like Google Chrome show security alerts, when such a website has sensitive form data, and is not using SSL encryption. In this tutorial, the Coding Cat will show how to install free Let’s Encrypt SSL certificate for your website, that auto renews on Debian. On other Linux distributions the process is very similar, you can check it here: link.

Let’s Encrypt certificates expire in 90 days, but you can automate renewal, in this article we will show how. There is also a limit: 20 certificates per week. More about the limit: link.

Before installing the certificate make sure you have domain properly installed. If not, check out our tutorials How to install LAMP and How to configure a domain.

Installing certbot

First you need to add jessie-backports to your sources.list:

sudo sh -c 'sudo echo "deb jessie-backports main" >> /etc/apt/sources.list'

Then update:

sudo apt-get update

Installing certbot for Apache:

sudo apt-get install python-certbot-apache -t jessie-backports

Installing certbot for Nginx:

sudo apt-get install python-certbot-nginx -t jessie-backports

Installing certificate for a domain

For Apache configuration run:

sudo certbot --apache

For Nginx:

sudo certbot --nginx

You should see something like this:

Certbot - choosing domain

Enter numbers of domains you want to enable HTTPS separated by commas or spaces, like “1 2 3” and press enter.

Then enter your email address, which will receive important notices from Let’s Encrypt about security issues and expiration. Then accept Terms of Service by typing “A” and pressing enter.

∗If you see an error like this (Apache):

Expected </VirtualHost> but saw </VirtualHost></IfModule>

Just add an enter to the end of your VirtualHost configuration file and try again by “sudo certbot –apache” command.

If all went well, you should be able to choose “Easy” or “Secure” mode. In “Easy” mode, all requests are allowed, http and https. With secure mode, all http requests are redirected to secure https. Choose one and press enter.

Next you should see “Congratulations! You have successfully enabled https://{domain}” message

Navigate to your website and check if https works, you can also test on{domain}

Or sslhopper:{domain}


Configuring auto renewal

To renew your certificates you can use a command:

sudo certbot renew

If you want to automate that, you need to register it on cron table:

sudo crontab -e

Crontab - choose an editor

Choose your editor and press enter.

Now, at the bottom, add a line:

12 3 * * * /usr/bin/certbot renew

so it looks like this:

Crontab - edit

Your auto-renewal task will be executed every day at 3:21 AM. Don’t worry, certbot will renew only certificates that are soon to expire.


Enter your domain name here:

This blog post will be parametrized for your case

1. Configuration directory

After you installed LAMP, you are ready to set your application online. To do that, you need to set VirtualHost configuration. Apache2 VirtualHost configuation files are in /etc/apache2/sites-enabled/. A good practice is to put them on /etc/apache2/sites-available/ and then symlink to sites-enabled, so you can remove domains by simply removing symlinks, without deleting the file.

So, go to your sites-available directory:

cd /etc/apache2/sites-available/

2. Create a VirtualHost config file

Create your domain config file, let’s assume, your website files are under /var/www/html/{domain}/

sudo nano {domain}.conf

Then, paste the code:

<VirtualHost *:80>
        ServerAdmin webmaster@localhost
        ServerName {domain}
        ServerAlias *.{domain}
        DocumentRoot /var/www/html/{domain}/
        <Directory />
                Options FollowSymLinks
                AllowOverride None
        <Directory /var/www/html/{domain}/>
                Options -Indexes
                Options FollowSymLinks MultiViews
                AllowOverride All
                Require all granted

        ErrorLog ${APACHE_LOG_DIR}/error.log

        LogLevel warn

        CustomLog ${APACHE_LOG_DIR}/access.log combined


Press ctrl+o to save, and ctrl+x to exit.

Then, create a symlink to sites-enabled directory:

sudo ln -s /etc/apache2/sites-available/{domain}.conf /etc/apache2/sites-enabled/{domain}.conf

3. Check configuration and reload

Run this code to test your Apache2. Coding Cat’s advice is to run this code everytime you make changes to Apache configuration. It may save you a lot of trouble.

sudo apachectl configtest

To reload Apache2 without impact of current website visitors, simply run:

sudo service apache2 reload

4. Done! Let’s check if it works

Open your browser, and go to http://{domain}/

If you get DNS errors, check if your domain points at your server:

dig {domain}

If not, you need to configure DNS records at your domain provider.


If you see 404 error, check if you have index file under /var/www/html/{domain}/ directory, like index.html or index.php, and make sure you did not receive any errors at step 3.


If you see other errors or a blank page, check out error.log file:

tail -f /var/log/apache2/error.log


What is LAMP?

LAMP stands for Linux + Apache + Mysql + PHP. In this blog post the Coding Cat will show how to install ready to use LAMP with newest versions: Apache 2.4, Mysql 5.7 and PHP 7.1.


If you are on vanilla Debian 8, first update and upgrade:

sudo apt-get update && sudo apt-get upgrade


Install Apache 2.4 on Debian 8

Installing Apache is simple, just run the code:

sudo apt-get install apache2


Install PHP 7.1 on Debian 8

By default PHP on Debian 8 is in lower version than 7.1, so we need to add some addresses to the sources:

sudo apt-get -y install apt-transport-https lsb-release ca-certificates
sudo wget -O /etc/apt/trusted.gpg.d/php.gpg
sudo sh -c 'echo "deb $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list'

Next, we can use apt-get to install PHP with modules we want:

sudo apt-get update && sudo apt-get install php7.1 php7.1-cli php7.1-fpm php7.1-apcu php7.1-apcu-bc php7.1-common php7.1-curl php7.1-intl php7.1-json php7.1-mbstring php7.1-mcrypt php7.1-mysql php7.1-opcache php7.1-soap php7.1-xml php7.1-xmlrpc php7.1-xsl php7.1-zip php7.1-gd php7.1-imap php7.1-intl php7.1-zip


Installing Mysql 5.7 on Debian 8

First we need to install libaio1 package

sudo apt-get install libaio1

Then download deb package from mysql website:

sudo wget
sudo dpkg -i mysql-apt-config_0.8.6-1_all.deb

When you see this screen below, just use arrows to go to this “Ok” and press enter. This is one of the worst UX the Coding Cat have ever seen..

Mysql installation screen


Update and install

sudo apt-get update
sudo apt-get -y install mysql-community-server

Done. Check installed versions.

Now you are all set, check your version of PHP:

php -version

Version of MySQL:

mysql --version

Version of Apache

sudo apache2 -v