More and more internet access providers are closing port 25 to reduce spam except for connections to their own mail servers. If you run your own email server and have problems connecting to it on port 25, you can enable port 465 (SMTPS) in postfix as a workaround. Edit the /etc/postfix/master.cf file: nano /etc/postfix/master.cf and …
How to enable port 465 (smtps) in postfix mailserver Read More »
The following article describes the steps that need to be taken to debug ISPConfig 3 server scripts. This procedure applies to all ISPConfig 3 versions incl. ISPConfig 3.1 and ISPConfig 3.2. Enable the debug Loglevel in ISPConfig Login to the ISPConfig interface and set the log level to Debug under System > System > Server …
Debugging of ISPConfig 3 server actions in case of a failure Read More »
Most Linux servers are administered on the command line e.g. through an SSH connection. In the following tutorial, I will explain several shell commands that make it easy to view log files on the Linux command line (shell). These commands will work on all major Linux distributions incl. AlmaLinux, CentOS, Debian, Fedora, RockyLinux, and Ubuntu. …
Linux Basics: How to view log files on the shell Read More »
OpenSSL Cryptography and SSL/TLS Toolkit is an open-source, full-featured package used in Transport Layer Security (TLS) and Secure Socket Layer (SSL) protocols to provide secure communication between client and server. This commercial-grade and robust toolkit is widely used by various programs like PHP, Internet servers, comprising the majority of HTTPS websites. Most Linux distributions come …
How to Build and Install OpenSSL from Source on Ubuntu Linux Read More »
Featherpad is a unique text editor for programming. It directly competes with major text editors. However, Featherpad is based on Qt engine. It has some unique features like drag and drop of attachment. The tabs can be detached and the editor can autosave the progress. I will install it on Ubuntu 22.04 and show you …
For graphic designers who are just starting out in the industry, paying up thousands of dollars to Adobe for their suite of applications is a monumental task. Fortunately, there are various open-source applications looking to bridge that gap for free. If you’re looking for an alternative to Adobe Illustrator to flex your vector graphic designing …
Slack is an up-and-coming application for communicating in the workplace. It comes with all of the standard functionality, but its extra features are amazing. Slack offers call and video conversations in addition to text communication. Slack has a channel function that allows you to organize your conversations into sub-categories and allows you to search for …
Deepin is an advanced screenshot tool, I use it personally on my Ubuntu system. It takes screenshots easily and it also includes drawing tools to enhance the images. This tutorial shows you how to install and use Deepin on Ubuntu 20.04. But they should work on the upcoming Ubuntu 22.04 as well. Prerequisites to Install …
There are several text editors available for Linux and one of them is gEdit. It is developed by Gnome and can be installed from standard Ubuntu repositories. You will see how to install it. I am using Ubuntu 20.04 Mate edition, and it does not come preinstalled. The text editor has an enormous number of …
Neovim is an extendable Vim-based text editor. It can be extended using plugins and APIs. It can also be hosted on the cloud for teamwork. It is compatible with the Vim editing model and Vimscript. Neovim is 30% lighter than regular Vim. It comes with an excellent modern interface. Neovim has a built-in terminal emulator …
