One challenge that chip makers have juggled is the power requirements for faster chips and the heat output associated with them. In some cases, cooling fans and heat sinks have become inefficient ways to keep chips cool, leading a few to invest in liquid cooling and other unconventional methods.
As the world becomes more […]
Other companies that produce x86 processors include Cyrix, AMD, and VIA. AMD, in particular, has become Intel’s biggest competitor.
At the turn of the century, Intel introduced their high-powered 64-bit processor line called IA-64 or Itanium. Originally produced at HP, Intel later joined in the development with the intention of making server-class processors to […]
If you have grown up using Microsoft Windows on your desktop or laptop, you are probably accustomed to the universal solution to most problems: reboot. When your screen freezes, reboot. If your system gets slow, reboot. That is the standard solution that even tech experts often dish out to common users. As a server administrator, […]
When managing your Linux server, you may encounter lag or other performance issues that lead you to question what files your server might be accessing at a given time. Or you might just want to run routine diagnostics to make sure your server is only running and manage files that it is supposed to run. […]
If you ask someone at Red Hat about CentOS, they will likely tell you that it is a great “community” distribution, but for enterprise servers, you need Red Hat Enterprise Linux and the support that comes with it. This is their job, of course, to promote their own software, but there is also some truth […]
Ubuntu is well known for being one of the most popular Linux-based desktop operating systems, but it is also become popular for server usage as well. The highly-acclaimed cloud platform OpenStack is built around Ubuntu, and many web hosts now offer it as an option for their VPS and dedicated server clients. This brief tutorial […]
Managing MySQL from the command line is not exactly what one would call quick and easy. Also, there may be times when you do not have immediate access to SSH or have the time to type in multiple commands. Fortunately, phpMyAdmin offers a user-friendly and fast approach to managing your databases. For example, you can […]
In enterprise IT, Flash is a very popular topic. Traditionally, flash storage has been reserved for mobile devices, but more recently it has found its way into servers and even on network devices.
Flash storage can serve a number of purposes:
Replacing or supplementing the hard drive. This type of flash storage is often called a Solid […]
If you have been following our Ubuntu server series, you have learned how to setup a LAMP server and configure an APF firewall. In order to do any of this, you likely already had your networking configured correctly, but if you do not, this brief tutorial explain how to setup name servers and ensure they […]
LAMP is a software stack for servers that refers to Linux Apache MySQL and PHP. It is still one of the most common configurations for servers and web applications, and it is very easy to install on Ubuntu servers. Simply follow these instructions:
The first part of LAMP, namely Linux, should already be installed, so […]
On an Ubuntu server, you might encounter a problem when it comes time to create a new user manually. Running the “useradd” command will create a user but do nothing else. It will not ask you to create a password or create a home directory. There are two easy solutions for this:
1. Run useradd […]
On Debian and Debian-based servers (such as Ubuntu Server), the primary method of package installation is APT. Using the apt-get command, you can download and install software from the distribution and third-party repositories with relative ease. There may come a time, however, when you need to install a deb package that is not from your […]
When purchasing a car, a home, or other major investment, many financial experts may inform you about the total cost of ownership (TCO). Beyond the sticker price, you need to know how much it will cost to maintain it, insure it, and power it for the duration of its life. Similarly, a server and its […]
In the past, creating a testbed environment for your server often involved setting aside an old machine or even using a desktop or laptop computer. In most cases, it was difficult to mimic the exact hardware configuration of your server and not as efficient. Virtualization changed all of that, and VMware Player is one free […]
Under normal circumstances, your MySQL server may only allow applications to connect to it locally, meaning both are running on the same server. If, however, you run MySQL on a separate machine, you will need to configure it to permit remote connections.
(Note: Replace terms in italics with the correct information from your own server)
Once upon a time, it was conventional Unix server wisdom to reboot every month or so to make sure it was working correctly. These days many Linux system administrators boast about the number of days their servers have been up and running without interruption. BSD and other Unix-like OS users also claim similar uptimes, sometimes […]
It could be a freeze, a crash, or simply completely or near unresponsiveness that drives you to shut off your server and start it back up cold. That, however, is never ideal. The ideal way to recover a system is to bring it back to complete functionality or simply restart it gracefully. Enter Magic SysRq, […]
Your dedicated server needs regular maintenance. It will not take care of itself. The following checklist will help you keep your server in top shape.
1. Check your backups – Just because you make backups does not mean they actually work. You need to test them to make sure your server is performing backups correctly. […]
Memory is one of the most important features of any server. The more RAM a program uses, the less you will have available for other applications. Therefore, it is important to monitor memory usage on your Linux server to ensure that all programs are playing nice and that nothing wrong is going on.
1. /proc/meminfo […]
Zombies present a particularly unique problem to system administrators. No, I do not mean the type of zombies that eat brains. I mean zombie processes. A zombie process is a process that is no longer active on a system but that refuses to die. In most cases, a zombie is not something that should alarm […]
When your server suddenly stops functioning the way it is supposed to, there are a number of troubleshooting techniques you can try. One of the most important things you can do is backtrack and investigate to see if some changes you recently made might have caused the server to stop working. If you discover irreparable […]
Once you delve into the world of Linux and Unix dedicated servers, you are likely to encounter the term NFS. What is it and how is it used in server configuration?
NFS stands for Network File System (NFS) and serves as a method for mounting drives or directories remotely over a network. NFS has […]
When physical space is an issue but you have virtual space to spare, virtualization is a great way to consolidate multiple server instances into one machine. Linux is very flexible when it comes to virtualization and even has virtualization capabilities built into the kernel.
There are three levels of Linux virtualization that determine how the virtual […]
On Debian-based systems, the APT package management system stores downloaded packages even after you have installed them and keeps the handy in case you want to reinstall without having to re-download. After a certain amount of time, you might decide you no longer need to keep these packages around, especially if they are taking up […]
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 […]
Linux is a free and open source kernel that powers numerous operating systems (often called “distributions”). Many system administrators have long regarded Linux as the best option for powering web-facing dedicated servers and virtual private servers. There are, however, many other options. So, what makes Linux the best, or is it even truly the best […]
Downloading a file from your server should not be tricky. If it is a web-facing file, you can usually download it with your web browser. If it is not, you could use FTP. The problem with both of these options, FTP and HTTP, is that neither is truly secure. If you need to download a […]
On a Unix or Linux server, the “du” command provides a quick and easy method for finding out how much space each directory is using, as well as a summary of total disk usage. For example, if you just typed “du” from the command line, the output might look like this:
As we approach the new year, it might be tempting to make sweeping changes to your organization and to your dedicated server. This is a normal feeling. After all, even in our daily lives, we often start the new year with resolutions (ones that are often too high-reaching and hard to keep). The question posed […]
As the end of the year approaches, now is a good time to make sure your server is living up to your security standards. It might be easy to neglect if you do not have any noticeable security problems, but the only way to truly know how your server is fairing is to run a […]