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Category: Tutorials/Tips

How to install Oracle JRE on Fedora 20 and use alternatives to switch between it and OpenJDK

How to install Oracle JRE on Fedora 20 and use alternatives to switch between it and OpenJDK

All the Java components installed on Fedora (20) are provided by OpenJDK (Open Java Development Kit), a Free Software implementation of Java SE (Standard Edition). It’s all you’ll need except when you have to install an application that requires Oracle JRE (Java Runtime Environment). One such application is the community edition of Datastax Cassandra, a NoSQL database. I thought I […]

How to extend, grow or resize an LVM logical volume

How to extend, grow or resize an LVM logical volume

This short tutorial shows how to resize an LVM logical volume. WARNING: Do not reduce the size of an active logical volume. It is the easiest way to lose you data. Recovery is possible, but it can be an involved process. Use this just as a guide on how to grow an LVM logical volume. The screenshots you see in […]

Upgrade Ubuntu 12.04 server to 14.04

Upgrade Ubuntu 12.04 server to 14.04

‘Tis the season for upgrading. First was upgrading OSSEC from 2.7 to 2.8, see Upgrading OSSEC 2.7 to 2.8 and the bro-ids rule issue. Now’s the time to upgrade the server that OSSEC was protecting. Before the upgrade, the server was running Ubuntu 12.04 LTS. It was upgraded to Ubuntu 14.04 LTS less than an hour ago. Here’s how I […]

Upgrading OSSEC 2.7 to 2.8 and the bro-ids rule issue

Upgrading OSSEC 2.7 to 2.8 and the bro-ids rule issue

‘Tis the season for upgrading. This hour, the target is OSSEC. Next will be a Cloud server running Ubuntu 12.04 LTS, which will be upgraded to Ubuntu 14.04 LTS OSSEC is a cross-platform and Free Software “host-based Intrusion Detection System that performs log analysis, file integrity checking, policy monitoring, rootkit detection, real-time alerting and active response.” It is one of […]

ProtonMail and Subrosa: Encrypted communication for the privacy-conscious

ProtonMail and Subrosa: Encrypted communication for the privacy-conscious

ProtonMail and Subrosa are two separate communications services that’s attempting to offer users a platform for secure, encrypted communication. They are trying to offer what’s come to be known as zero knowledge (also zero access) Cloud data service, that is, the service provider cannot read your data. And at a time of all-out government snoopy, you cannot be too careful […]

How to use Deepin 2014 Guest account

How to use Deepin 2014 Guest account

Deepin 2014 ships with a guest user account, but you’ll need to enable it before you can use it. It took me a while before I figured out how to use it. This short tutorial shows how to enable and use it, if you are still trying to figure it out yourself. It’s a simple, 4-step process: 1. Log in […]

Managing startup applications on Deepin 2014

Managing startup applications on Deepin 2014

Since Deepin 2014 was released, I’ve been trying to figure how how to add and remove applications from the startup applications manager. Turns out that the reason I could find it is that Deepin 2014 has another take on how to manage startup applications. It’s a neat approach, but it has a drawback. Let’s take a look at the neat […]

Manual disk partitioning guide for Deepin 2014

Manual disk partitioning guide for Deepin 2014

Deepin 2014 is the latest edition of Deepin, a Linux desktop distribution based on Ubuntu. Deepin 2014 is the first version of the distribution that comes with its own graphical installer. Like all Ubuntu-based distributions, previous editions (of Deepin) used their parent distribution’s graphical installer. This tutorial provides a step-by-step guide on how to partition a hard drive manually for […]

Dual-boot Deepin 2014 and Windows 7 on a PC with UEFI firmware

Dual-boot Deepin 2014 and Windows 7 on a PC with UEFI firmware

Deepin 2014 is the latest edition of Deepin, a Chinese, Linux desktop distribution that’s based on Ubuntu. Aside from the fact that it comes with its own desktop environment called Deepin Desktop Environment, it also uses its own graphical installation program. The installer doesn’t have support for disk encryption and LVM, the Linux Logical Volume Manager, but for plain-vanilla installations […]

Manual disk partitioning guide for Linux Mint 17 KDE

Manual disk partitioning guide for Linux Mint 17 KDE

This tutorial provides a handy, manual disk partitioning guide for the KDE edition of Linux Mint 17, which comes with an installer that has an interface that’s slightly different from that used on the Cinnamon, MATE and Xfce editions. The installer has automatic and manual disk partitioning options, with support for UEFI systems, which means that the installer is able […]

Dual-boot Windows 8 and Linux Mint 17 on a PC with 2 disks and UEFI firmware

Dual-boot Windows 8 and Linux Mint 17 on a PC with 2 disks and UEFI firmware

This tutorial shows how to dual-boot Linux Mint 17 and Windows 8 on a computer with two hard drives and UEFI firmware. For a guide on how to perform the same operation on a computer with one hard drive, see How to dual-boot Linux Mint 17 and Windows 8 on a PC with UEFI firmware. The computer used for the […]

How to dual-boot Linux Mint 17 and Windows 8 on a PC with UEFI firmware

How to dual-boot Linux Mint 17 and Windows 8 on a PC with UEFI firmware

This tutorial shows how to dual-boot Linux Mint 17 and Windows 8 on a PC with UEFI firmware. The computer used for the test installation is not an OEM one. Rather, it is a custom-built computer, with an ASRock motherboard and Intel Core i3 processor. However, if you follow this guide step-by-step, you should be able to use it to […]

Replace Ufw firewall with FirewallD on Linux Mint 17 Cinnamon

Replace Ufw firewall with FirewallD on Linux Mint 17 Cinnamon

Ufw (Uncomplicated FireWall) is the firewall application that comes with a default installation of Linux Mint 17 – Cinnamon or MATE. This article shows how to replace it with FirewallD, a firewall application that has support for dynamic rules and network zones. It originated from the Fedora project. FirewallD comes with a command-line utility called firewall-cmd, a graphical interface called […]

Managing startup applications in GNOME 3

Managing startup applications in GNOME 3

If you wanted to set up an application or applications in GNOME 3 to launch on boot, you’ll probably go looking for a module in the desktop’s System Settings. But you’ll be disappointed because there’s no module in there, at least from GNOME 3.10.2, to do that in System Settings. The application you’ll need for the task is called GNOME […]

Triple-boot Windows 7 and 8 and Ubuntu 14.04 on a PC with UEFI firmware

Triple-boot Windows 7 and 8 and Ubuntu 14.04 on a PC with UEFI firmware

This tutorial provides a step-by-step guide on how to triple-boot Windows 7 and 8 and Ubuntu 14.04 on a computer with UEFI firmware and on a single hard disk drive (HDD). The working assumption is that the first OS on the computer, which could be OEM or self-built, is Windows 8. Windows 7 will be installed alongside it, followed by […]

From GNOME 3 to GNOME Classic in 3 extensions, or why GNOME Classic has become redundant

From GNOME 3 to GNOME Classic in 3 extensions, or why GNOME Classic has become redundant

GNOME Classic is a GNOME 3 desktop designed to offer the look-and-feel of a GNOME 2/MATE desktop, that is, of a traditional or classic GNOME desktop. It’s for people who are not fond of the default GNOME Shell. It comes with every installation of GNOME 3, offered as an option in the login screen’s Session menu. To use it (GNOME […]

How to customize GNOME 3.12 GNOME Shell

How to customize GNOME 3.12 GNOME Shell

This tutorial shows how to customize a GNOME 3 desktop, that is, take a plain-vanilla GNOME Shell and transform it into a desktop that is a little bit more user-friendly. That means installing and customizing a few GNOME Extensions directly from http://extensions.gnome.org or by using the GNOME Tweak (Tool). So if you’re using a GNOME 3 desktop with the default […]

GNOME 3.12: The cool and the not-so cool features

GNOME 3.12: The cool and the not-so cool features

GNOME 3.12 was released on March 26 (2014), but it didn’t start shipping on many distributions until very recently. In this post, I’ll let you in on what I think about it; the cool (good) features and those features I think the developers need to take a closer look at and try to make it better and more user-friendly. If […]

How to delete boot managers from a UEFI boot menu

How to delete boot managers from a UEFI boot menu

This short tutorial shows how to delete boot managers from a UEFI boot menu. It might not apply to all computers, but if your computer is anything like mine and you install and reinstall Linux distributions and other operating systems as often as I do, I think you’ll like to know how to remove those boot manager entries that you […]

Dual-boot Windows 7 and Antergos on a PC with 2 HDDs and UEFI firmware

Dual-boot Windows 7 and Antergos on a PC with 2 HDDs and UEFI firmware

This post shows how to dual-boot Windows 7 and Antergos 2014.05.26 on a computer with two hard disk drives (HDD) and UEFI firmware. The test computer used for this tutorial has a 500 GB and a 250 GB hard drives connected, with Windows 7 Pro already installed on the 500 GB HDD. The screenshots and descriptions in this tutorial show […]