Yesterday I went through a cPanel upgrade and the following morning I got the following emails in my mailbox:
Certificate for courier-imapd on myserver.com will expire in less then 30 days.   You should install a new certifcate  as soon as possible.   You can install a new certificate in WHM under “Manager Service SSL Certificates”
* Of course, [...]

Are you wondering why your server seems to be running slower than it should? Or perhaps, you’d like to know if it’s time for an hardware upgrade?
Today I’m going to show you some basic Linux commands that allow you to see how your system performs and how to manage processes. I’m not talking about intensive [...]

Two of the most popular file compression formats on Linux are TAR and ZIP. You might have seen some file archives with the .tar.gz extension. Those are TAR archives. On the other end, zipped files are well known as they also exist on other operating systems such as Microsoft Windows.
Using TAR To Compress Or Extract [...]

Ok it’s time for a new Linux Basics Commands tutorial! Today we’re going to see some basic commands that allows you to create, move or delete files and directories in a Linux shell.
While some of you may prefer to use a GUI like Gnome, it’s always nice to learn this basic stuff. Sometimes you don’t [...]

To change your server’s hostname manually on CentOS / RHEL is quite easy. Simply edit the file /etc/sysconfig/network with your favorite text editor and change the value of the HOSTNAME parameter to the new hostname. Your configuration file should look something like this:
/etc/sysconfig/network
NETWORKING=yes
HOSTNAME=”newhostname.domainname.com”
GATEWAY=”192.168.0.1″GATEWAYDEV=”eth0″
FORWARD_IPV4=”yes”
You’ll also need to replace all occurencies of your old hostname in /etc/hosts. [...]

There are times when you might need to automate the execution of some particular tasks on your web server. Some of these tasks could be maintenance tasks, backups, monitoring, etc. Just as with Microsoft Windows, Linux / Unix workstations and servers have the possibility to run shell commands periodically on a given schedule.
The service in [...]

While the basics of web hosting are not that complex, it’s important to know what you’re doing in order to keep your web server efficient and secure.
As many web servers out there are running on Linux while most workstations are running on Windows, mastering Linux administration concepts can be confusing at first. Today we’re going to [...]

Unlike MS Windows’ file system (NTFS), hidding a file on Linux is not done by setting it’s hidden attribute: it’s done by setting its name. That’s right. File names that start by a “.” are automatically hidden. Here are a few examples of common hidden files on Linux systems:

.htaccess
.profile
.bash_history

To list all files including hidden ones [...]

Sometimes it’s useful to be able to find out how much disk space a directory is taking. While there are some web interfaces or desktop applications that allows you to do that, it’s always useful to know how it can be done through a command shell.
The DU Command
To find out how much space is being [...]

When you’re working remotely on a Linux server through SSH, you are at risk of losing important data if you encounter a network failure. Worst than that, you could even end up “breaking” your Linux box or locking yourself out. Think about a critical component installation interrupted by a network problem. That could mean disaster [...]

While this is a well know security measure, I still see so many Linux servers that allow root login through SSH that I thought I’d post it here.
Before you make change to your Linux box, make sure that you’ve got a normal user account created otherwise you’ll lock yourself out unless you’ve got physical access [...]

I’d like to add a little something about the CentOS 5.0 Perfect Setup. After following carefully each instruction step-by-step, I noticed that at least two PHP extensions were missing: php-mcrypt and php-mbstring.

Sometimes your web server’s internal clock can be somewhat unreliable. While this may not have any considerable consequences on an isolated server or network, this can turn out to be a nightmare when you connect it to the Internet.

Although your virtual CentOS server should be working fine at this point, it is recommended to install the VMware Tools to increase performance and functionnalities.
The VMware Tools do not have to be downloaded or whatever: they are made available from the VMware Server console.

Now that you have installed VMware Server and that you’ve created a virtual machine, let’s go to the next step. We’re now going to select the package groups required to run our virtual web server and proceed to the installation.