linux

Sometimes you need to test some functionality on mobile device but from the website which is running on your laptop. There is a simple solution - SOCAT.

Latest viber.appImage was not working on Ubuntu 21.10.
The solution was found!

I was playing with Windows XP on the latest Virtualbox 6.1.26 and discovered that there is no Direct3D support anymore! I've tried everything like 256MB RAM for video and checkbox, for sure.
On one of the page I found info that on the version 5.1.38 it still working. And I reinstall virtualbox from deb package. Install was not clear, since packages 

A while ago I"ve faced with a problem on VPS - there were no free space! I couldn't login into admin panel installed there. SSH was not working too.
The only thing that was wroking was FTP server which helped me to connect and free some space deleting non used files. After that operation I've finally logged in.
So, be patient to the free space available on your server and have a couple of entrances there.
One of the solution to prevent the situation like this is to have a dummy file which can be deleted in such critical moments to free up the space.

There are very useful commands in imagemagick package to convert JPG to PDF.

In the previous article I covered running and managing multiple containers (sites) with a single docker file. The next task is separate variables for different sites in the env file.

This article will provide you the information about running multiple websites with Docker from different docker-compose files, make them working on 80 port with user-friendly urls. Traefik 2 will help with it.

I bet u saw with error message window “System problem detected” in Ubuntu. This issue comes from existance of files in /var/crash folder. Inspecting those files could help you to validate the errors in applications and check what's wrong with it.

Information about journals in Linux and how to control their size.

Found the bug in Geany editor with underscores - they were invisible. Default font is Monospace.
Here is a solution how to fix it.