Archive for November, 2011


How to Send Live Messages to All Shell Users

In a previous post, we explained how to send a message of the day (MOTD) to all users whenever they log into your server’s shell. It is a perfect way to reach users when they log in, but it will not allow you to send new messages to users who are currently logged in. […]

How to Suspend User Accounts on a Linux Server

I hope the time never comes when you have to take action against a user on your dedicated server, but if the situation does arise, you should know how to handle it. With a Linux server, there are several ways to disable an account without completely deleting it. This is useful if you have a […]

Starting, Stopping, and Reloading Services

Linux-based dedicated servers typically run two primary types of programs: those which require user interaction and those which perform tasks in the background without user intervention. Those programs that run in the background are commonly called “services” or “daemons”.
Servers usually require numerous services to run the background, such as the web server, mail server, database […]

Troubleshooting High Mail Server Loads

These days many personal email accounts are hosted on cloud servers, leaving many web servers without the need to send and deliver emails to their users. For plenty of businesses, however, having a mail server is still very much a part of the dedicated server experience.
If you host your own mail server, whether Postfix, Sendmail, […]

Low Cost, Low-Powered, Green Servers

As energy costs continue to rise and new environmental regulations come into effect, many businesses are looking for ways to reduce data center costs. A server uses a lot of power for processing and cooling. By using low-powered servers for certain tasks, you can reduce energy costs and help save the environment.
When Is a Low-Powered […]

5 Tips for Better Server Backups

Of all the topics we have repeatedly stressed, none is more significant that backing up your server. It is the only way to ensure that your data will be safe even if the most inconceivable disaster occurs. Once you have working backups for your server, it is important to evaluate your backups and also make […]

How to Fix a Chroot Network Connection Failure

Creating a chroot jail is a great way to separate certain activities on a dedicated server from the rest of the server at large. Purposes for this can range from creating virtual private server containers to simply needing an isolated test environment. One common problem you may experience after create a chroot jail is that […]

How to Install FFMPEG in CentOS

Websites have graduated far beyond simple text-based one-page documents. Most include all sorts of multimedia, from videos to full animated applications. Many small website owners may rely on cloud service providers for their music and video streaming, but if you ever need to host your own media content, you will probably need a program that […]

Choosing Between KVM and Xen

Virtualization can save you time and money when used efficiently. This has made it very popular for small, medium, and large sized data center operations. Whether you have a single server or a fleet of them, virtualization has its benefits.
KVM and Xen are two virtualization options for Linux servers, both with their advantages. Xen is […]

Find Out Your Server Load, Users, and Uptime with One Letter

Sometimes, you are in a rush and just need to make sure your server is OK.  There are plenty of commands or scripts you could run to check on your server, but there is only one that only takes a single letter. The “w” command is quick, simple, and can be powerful.
When you are in […]

How to Build a Chroot Environment in CentOS

The purpose of a chroot jail is to allow you to run a virtual file system within a larger one. You can use it for any number of reasons, including virtual shared hosting accounts. The user whose login account is associated with a chroot jail can use an entire virtual Linux distribution within the jail, […]

How to Install CentOS in VirtualBox

Virtualization is a great tool for testing, learning, and general server skills practice. Using a virtualization tool like VirtualBox, you can install a server operating system within a virtual machine on your desktop or laptop. Once installed, you can pretty much do whatever you want with it and use it to learn more about […]

How to Disable Direct Root Login

On a Linux server, root is the administrator of everything, the king of the hill. Root can do whatever he wants, whenever he wants. With full access and full privileges, root is the most powerful user on the server. While it may be convenient to login to your server as root and get to work, […]

Restricting Shared Hosting Accounts

Shared hosting is a type of web hosting where multiple users share the same server. If you have a dedicated server, you might offer shared hosting accounts to your users who need hosting accounts with their own domains but are not ready for a VPS or dedicated server of their own.
Because shared hosting users have […]

Do You Need a Dedicated Server for One Website?

If you are new to web hosting or are just getting started with your website, the whole idea of a dedicated server may be foreign to you. At some point, however, you might find yourself in need of one or even several. In many situations, people use dedicated servers for multiple websites, but there are […]