So you've installed spamassassin and it works good but you still are getting unflagged spam emails through? Perhaps you need to try greylisting.

When you're running production servers, the one thing you don't want to do is upgrade the kernel every time a new update comes out. Why? Because that's the only Linux update operation that requires a reboot once it's done—and in a production environment you often can't have downtime.

How to change the hostname quickly and without rebooting the box since there are 18,000 users all trying today to access data from that one server?

If you've got a web application that uploads files to the server through a PHP script, you might have noticed that by default you can't upload terribly large files. Here's how to change it.

All Dell servers come with the Dell OpenManage Server Administrator software which has the ability to monitor and display system level indicators. Here's how to batch assign them to send an email.

Changing the group a user is associated to is a fairly easy task, but not everybody knows the commands, especially to add a user to a secondary group.

In our previous article, we showed you the fastest way to go from a simple list of users to their creation in Active Directory. However, you’ll frequently get a list of users that will have extra data fields. Since we can’t write a script ahead of time for every possible scenario, we’ll show you how to take our user creation PowerShell script and modify it to suit your purpose.

Creating users through the AD Users and Computers snap-in is a very easy process, but you’ll frequently face the situation where you need to create accounts for a whole group of people at once. We've made it super easy.

Creating a new user on Ubuntu server is easy—just sudo your shell to root, or run the following command: adduser username This will create the user, with output something like this: root@ubuntugeek910:~# adduser testuserAdding user `testuser' ...Adding new group `testuser' (1001) ...Adding new user `testuser' (1001) with group `testuser' ...Creating home directory `/home/testuser' ...Copying files from `/etc/skel' ... You [...]