VirtualBox: Guest OSes not booting (black screen) after updating the host machine

On 90% of the cases, this is due to a bad (either corrupt or mismatched) expansion pack (both on Linux and Windows). Follow the steps below to reload the expansion pack: Start VirtualBox and click on File and then on Preferences, as shown on the image below: Navigate to “Extensions” and select/highlight “Oracle VM VirtualBox […]

Fedora Core: Installing Viber on your Fedora-based system

As many of you probably know, Viber has recently launched its official version for Linux systems. Unfortunately it was released with a few limitations — not only there’s no 32-bit version (so forget about it for now if you’re on an i386 arch), but it was also developed for Ubuntu and its derivatives, such as […]

Adobe CS5: Payload cannot be installed due to dependent operation failure

I just got this error while trying to install a few applications from the Adobe CS5 suite on a relative’s system today. The installation would basically stop, and the following would show up in the installation logs: WARNING: Payload cannot be installed due to dependent operation failure After some research with no productive results I […]

Windows 7: An error occurred while checking for new updates for your computer (Code 8024800A)

I have recently I have made Linux the primary OS on all my computers. However, mostly due to Adobe Flash/Photoshop and other few important applications, I decided to leave Windows on a separate disk on each of the computers. (I’ve basically installed Linux into 2 new disks and left the existing Windows drives untouched, as […]

Sony Xperia U (ST25i): Performance issues after updating to Android ICS (4.0.4) using the official method

I have noticed my household’s Xperia U (ST25i) slowed down quite a lot after upgrading to ICS (6.1.1.B.1.54-Stock Version), using the official method provided by Sony. I do not want to have the phone rooted at the moment, so wanted to ensure I would find a solution without requiring such thing. And I just did. […]

D-Link DIR-600: Installing custom firmware (DD-WRT)

Nearly 2 years ago, I have posted a small review and introduction to the D-Link DIR-600’s basic and advanced settings. With time, I ended up finding a few bugs on the router, and so did my visitors, who left a good amount of comments there. I ended up installing custom firmware on the router, but […]

Oracle VirtualBox: Installing Guest Additions in Fedora 18 (and all others)

Unfortunately you cannot just install VirtualBox Guest Additions¬† in a fresh Fedora 18 install, as it will require a few additional packages to be installed and a few minutes checking on the logs to identify any possible further issues. While the Guest Additions are not required to use a CLI-based Virtual Machine,¬† they are essential […]

Exim: Clearing the internal eximstats database (cPanel)

Clearing the eximstats database isn’t something difficult to do via phpMyAdmin or a similar web-based database management application, and shouldn’t harm anything in your system. However, if you run into any issues, or just want to re-initialize the database and re-create the tables structures manually via SSH, here’s what you should do: mysqladmin drop eximstats […]

WordPress: Password-Protected pages not working on folders within WordPress’ directory (Error 404)

Symptoms: You add password-protected directories to folders within your WordPress installation, but instead of showing a password-protection prompt, your browser will show a 404 page instead This appears to be a common issue for users that try to password-protect folders within an installation of WordPress. This happens because you did not define a 401/403 (depending […]

cPanel: RoundCube not working (Error 500)

Symptom: When you log into WebMail and select RoundCube, you will get an Error 500. The first thing to try is to force an update for RoundCube by issuing the following command via SSH: /usr/local/cpanel/bin/update-roundcube –force If the reason for RoundCube not to work is its configuration files, this command will do the trick. Now, […]