If your /boot partition is full (100% use of space), the easiest way to fix the problem is to delete old and unused kernels that are often taking the space. The following article describes the process of removing unused kernels on CentOS Linux 8.x Linux when /boot partition has no free disk space. [Read more…]
This article illustrates the steps required to downgrade (or is it upgrade?) the CentOS 8 from a GNOME server with GUI to a CLI command-line mode. I’ll show you step by step how to remove GNOME, X Window System, GUI and Graphical Administration tools from the CentOS 8 operating system.
If you want to host a domain on a server at home, using your ISP’s connection, you will realize that your DNS provider (in my case GoDaddy) will not be in sync with the dynamic IP address assigned to you by your Internet provider. Let me show you a free and easy way of addressing this common issue. [Read more…]
The following are the instructions for upgrading from CentOS 7 to CentOS 8.
Windows 10 auto restart after the update is somewhat of an annoyance and Microsoft is well aware of the user resentment. However, because they refuse to provide any solution, nor address user complains (just read the discussion thread), here is a simple way to disable Windows 10 Auto-Restarts after the patching update.
The following short example shows how to export the list of file names (basenames) and extensions inside the directory as a comma-separated Excel file.
Instructions on how to install Webmin on Centos 7.7 [Read more…]
As SnagIt currently doesn’t support Linux, the Flameshot is likely the only screenshot taking utility worthwhile to consider if you’re a Linux user. Here are step by step instructions on how to install Flameshot under Kubuntu KDE Plasma Desktop and also how to associate it with the PRT SC button.
The following article demonstrates the process of testing any Wi-Fi capable device against a key reinstallation attack. I’ll demonstrate the processes of executing the test using Kali Linux installed in the VirtualBox on a Windows machine. Then I’ll illustrate the process of testing recently patched Windows 10 as well as testing unpatched Android 7.0 mobile phone against the key Reinstallation Attack. This article also explores a newly discovered vulnerability of WPA2 named KRACK Attack (key reinstallation attack) in little more detail, as it’s one of the biggest vulnerabilities found in WPA2 to this day (patched only by a handful operating systems and Wi-Fi product manufacturers). The main issue introduced by KRACK attack is that it allows attackers to intercept all wirelessly transferred information in an unencrypted format, and do so without the knowledge of the wireless WPA/WPA2 network password. Serious? You bet…
One of the issues of Windows 7 (and Windows Server 2008 R2) is related to its inability to support 4K resolutions over RDP. Windows 7 RDP resolution is limited at 3840 x 2048, whereas 4K monitors run at 3840 x 2160, which leaves a small black strip at the top and bottom of the remote desktop window. The following article describes the way I was able to resolve this issue. [Read more…]
Recently, I have updated my Samsung Galaxy S7 to Android 7.0 Nougat and realized that I am missing both ‘Mobile Data’ and ‘Mobile Hotspot’ quick settings menu icons/toggles. For some reason, Samsung has decided to disable adding them into the menu. The following post shows you how to add them back using Android platform tools and ADB. [Read more…]
The following article covers the process of converting a physical Windows computer into a VirtualBox virtual machine image in 3 easy to follow steps. Once done, physical Windows computer can be opened as a virtual machine by using Oracle VM VirtualBox.
Following are the instructions on how to mount Amazon S3 storage to an AWS Lightsail Instance using S3FS and Fuse.
Following are simple instructions on how to programmatically create a snapshot of your Amazon Lightsail Instance using AWS CLI. [Read more…]