Linux Uptime 11
If you’re looking for the fastest and easiest way to get DMARC verification working on a RedHat (Fedora, RHEL or CentOS) mail server, I highly recommend OpenDMARC. I’m a bit biased, as I currently maintain the OpenDMARC package in the Fedora and EPEL repositories. This article will help you install the […]

Installing OpenDMARC RPM via Yum with Postfix or Sendmail (for ...

Why doesn't it look different? 7
Here’s the scenario: you’ve set up Dynamically Allocated Storage for the hard drive on your Guest VM in VirtualBox and you’ve run out of space — even though your Actual Size is smaller than the Virtual Size (this happened to me recently when my Virtual Size was 10 GB, and […]

Resize a Fedora, CentOS, or Windows Dynamic Guest Virtual Disk ...

Upgrade from Fedora 17 to 18 with FedUp 1
Fedora 18 (codename Spherical Cow) was officially released today, and there’s a mad scramble to figure out how to upgrade to this latest Linux desktop from Fedora 17. Previously, you’d have to either do a fresh install with a CD or DVD, or you could use the built-in PreUpgrade method. […]

Upgrade from Fedora 17 to Fedora 18 with FedUp

Backup... TO THE CLOUD! 8
I often say there are only two types of data: data that is backed up, and data that is waiting to be lost. Even if you’re the most contentious hax0r who always backs up your data, if your backups are stored in the same physical location as the source data, […]

How to Back Up a Linux Server to Amazon S3 ...

This is one of those blog posts that’s more written for my own benefit to refer to later than for the benefit of the Web-at-large, but if someone else happens to stumble upon it and it helps you out, then cool. 🙂 I had to migrate a Fedora box (the […]

How to set up two NICs on different subnets with ...

DKIM Test Message 143
For those who want or need to compile and install OpenDKIM from the source code, you can follow the instructions I wrote in this article. If you’re looking for the fastest and easiest way to get OpenDKIM running on a RedHat or CentOS system, I currently maintain the OpenDKIM package in […]

Installing OpenDKIM RPM via Yum with Postfix or Sendmail (for ...

This is another one of those articles I write mainly so I can reference it later to help me remember how I got something working, but if it helps someone else trying to get Amavis, ClamAV, and SpamAssassin working with Postfix on Fedora, then great!

Tips for installing Amavis-new, ClamAV, and SpamAssassin using Postfix on ...

You don’t need a Windows Media Center PC to share pictures, videos, or music with an Xbox 360. If you’ve got a Fedora / RHEL/ CentOS box on your home network and you’d like to use it as a UPnP and DLNA Media Server so that you can stream files […]

How to set up uShare media server on Fedora / ...

Installing the VNC server in Fedora 14 is a little bit different than I described it for Fedora 12, so here are some updated instructions for setting up VNC in Fedora 14 and connecting to it via Windows over the Internet.

How to Set Up VNC from Windows to Fedora 14 ...

One of my web servers sent me this email this morning: Subject: The certificate for ServerName.com has expired ################# SSL Certificate Warning ################ Certificate for hostname 'ServerName.com', in file (or by nickname): /etc/pki/tls/certs/server.crt The certificate needs to be renewed; this can be done using the 'genkey' program. Browsers will not […]

Renewing a Self-Signed SSL Certificate on Fedora/CentOS

I’m writing this in a VNC session from Windows 7, via a secure SSH tunnel over the Internet, to a remote Fedora 12 desktop (if you’re running Fedora 14, I’ve written a separate blog post about how to do that, too). If you’d like to be able to do the […]

Set up VNC from Windows to Fedora 12 Over the ...

Linux 4
I recently noticed that my /boot partition was at 95% full, so I investigated to see what was causing it. Apparently, it was filling up with older versions of the linux kernel as a result of upgrades. Because my system has been very stable, I decided to keep only the […]

Removing Old Kernels on Fedora, RHEL, or CentOS with Yum

After successfully setting up a dual boot of Windows 7 (64-bit) and Fedora 12 on my new Dell Studio laptop, I wanted to record some of the tricks that were necessary to get it done. The laptop is a Dell Studio 1737 (why didn’t they call it 1337?) which came […]

Dual Boot Windows 7 and Fedora 12 Linux with Dell ...