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DevWL – Blog
Wiktor Liszkiewicz
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Blog Posts:
MariaDB SQL Recursive call to self (single table)
If you need to recursively query data based on child / parent relation between rows, you can achieve that using WITH RECURSIVE & UNITE ALL query instructions. Let's have a look at example “software table”. Software can be declared as virtual machine, virtualizer,...
How to find large file/directory in a Linux system?
There easy way to find large folders on Linux is to use du command. See the example commands: sudo find / -xdev -type f -size +1000M -exec du -sh {} \; The above command list all files larger than 1000M with it size. du -h -x / | sort -h -r | head -10 This command...
Backup Linux server to local machine with rsync
The most popular way of backing up your Linux system are rsync and dump. The difference is that when using dump you need to work on a full image, where the rsync allows you to access individual files. Backup using RSYNC command From your local machine: rsync -chavzP...
Bubble sort Explained
Bubble sort complexity: O(n^2) Pseudocode: src: https://www.youtube.com/watch?v=xli_FI7CuzA Bubble sort PHP code example: function bubble_sort($arr) { $size = count($arr)-1; for ($i=0; $i<$size; $i++) { for ($j=0; $j<$size-$i; $j++) { $k = $j+1; if ($arr[$k]...
Different free and paid software solutions for managing web hosting
Control Panel Basic Features Comparison Are you searching for an alternative to cPanel, or perhaps you're looking to switch from DirectAdmin? Are there any other alternatives then Pleks? Let's find out. The table below represents a basic overview of commonly known web...
Open PowerShell terminal as Administrator from CLI
Type PowerShell and select run as Administrator from windows context menu. Open PowerShell terminal as Administrator (GUI) On keyboard, press Windows button ([win]) and [x]. The windows tool menu will pop up. [win] + x Open PowerShell terminal as admin from CMD (CLI)...
How to get Windows 10 activation KEY for my PC?
Perhaps you already tried to obtain Windows 10 key from CMD with a command you found on the Internet, but it did not work. I had the same problem. CMD simple did not work. I got blank output. So I tried to look for different solution. Below, I present a solution that...
Windows 10 best way to build secure connection from home to office over Internet.
Windows 10 with OpenVPN https://www.youtube.com/watch?v=hKfHwQgAsUo https://www.youtube.com/watch?v=XHtwVJt4AKo https://www.youtube.com/watch?v=hKfHwQgAsUo https://www.youtube.com/watch?v=HPKgzup2fco https://www.youtube.com/watch?v=jMv29ZQ7huQ...
How to protect PHP source Code?
When to keep your PHP code logic secret? Whenever you need to pass a script to a client, but you are afraid that it will get copied and reused elsewhere without your permission. How to protect your PHP code? You could implement code "blockers". Provide a licence key...
VPS DirectAdmin running out of space
Login to your VPS with SSH Find all files larger them 500 MB find / -type f -size +500M -exec ls -lh {} \; List root dir sizes. Or any current folder (run without /) du -h --max-depth=1 / Remove specific files: sudo rm -R nameofthefile...
Auto tagging in Google Ads
G to your account tab, from there click on to Account Settings and find campaign URL settings: function main() { var adGroupIterator = AdsApp.adGroups().withCondition("CampaignStatus = ENABLED").get(); while (adGroupIterator.hasNext()) { var adGroup =...
PHP-apache image – How to change php.ini settings in docker container with Dockerfile.
If you want to learn how to add a custom php.ini file to your apache-php image, install new extensions and edit configuration settings, stay with me for the next few minutes. As often, the best way to learn is to look on the working example so lets install xdebug and...
CodePen – JS Mini Projects
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