Heartbleed, the highly publicized OpenSSL bug with the unfortunate name, has a lot of system administrators scurrying to fix the problem. If you have not heard about it by now, it is a security hole found in OpenSSL’s TLS heartbeat extension that a cyber criminal can use to reveal 64k of memory on a connected […]
It is generally understood that a server running Linux needs to have a relatively recent kernel version or at least one that has been securely patched to fix any vulnerabilities. For dedicated servers, a kernel upgrade is not big deal; a simple install, reboot and you are done. For a virtual private server, it can […]
Many Linux operating systems offer the ability to upgrade to a new version of the OS without wiping the hard drive and reinstalling. On a dedicated server, you might call this an in-box upgrade. Generally, a new version of your Linux distribution will include a newer kernel version and newer software. Is such an upgrade […]
Ever so often, you might try to update your Ubuntu Server packages and find that certain ones are “kept back” during the upgrade process. These will often be kernel or other mission critical packages that do not get updated.
The reason some packages might get kept back is that some dependencies have been changed for them, […]
The word “hack” often brings up grim images of a shady individual sitting in a dark basement pounding away on a keyboard as he siphons money out of people’s bank accounts and funnels the funds to terrorist organizations. In reality, “hack” simply means a “solution to a problem” that is not necessarily uniform, standard, or […]
In the previous post, you learned how to install and remove software packages using Webmin’s graphical interface. Today, you will learn how to update individual packages and do a system-wide upgrade, all from within Webmin’s control panel.
Just like installing and removing packages, Webmin will rely on your package manager (APT, Yum, etc.) to update […]
A new year has arrived, and this is an excellent time to consider applying any upgrades that you were putting off until the end of 2011. In some cases, you may have delayed software upgrades in order to verify compatibility with your web applications, or you may have simply delayed your upgrades to make sure […]
It’s dead. After all the effort you put in your server, even choosing it over your spouse, there was nothing you could do to save it. Whether it was hardware failure, a massive and crippling cyber attack, or simply a colossal user error, the moment you always dreaded has come to pass: a […]
Sometimes it is difficult to know when it is time to make the move from one technology to another, or when to upgrade from one version to a later one. As your website or websites grow, it is important to track their progress, understand their weaknesses, and be prepared to take them to the next […]
Debian GNU/Linux and other OSes based on the free and open source operating system, such as Ubuntu, use a package management system called APT to install, update, and remove software. APT is very powerful and easy to use. You can access it from the command line via SSH, giving you full control over the software […]
Before we delve into the topic of server upgrades, it is important to define the terminology. With a Linux-based operating system, an “upgrade” refers to the latest snapshot packaged by the distribution’s developers. That usually includes a newer kernel version, newer libraries, and more recent software packages.
In addition to these upgrade snapshots, most […]
On Linux-based operating system, the kernel (simply called Linux) is largely separate from the rest of the operating system. While drivers and hardware functionality are controlled by the kernel, applications and services are all separate. That means that you can safely upgrade portions your system and keep the same kernel.
On a dedicated server, […]
Linux users have long debated whether it is better to perform an in-box upgrade or completely wipe a system clean and reinstall whenever there is a new major version release.
For desktop Linux users, the answer is matter of convenience. For server administrators, it can make or break a career or business.
Many Linux […]