Redhat


"Forget" your access point(s) on your existing UniFi Controller before adopting it on your hosted controller 1
UPDATE: I’ve written an automated script that performs all the¬†steps in this article in less than 60 seconds. Feel free to follow the steps below if you want full manual control, or download my script to make your life even easier. ūüôā Ubiquiti Networks’ Java-based UniFi Controller software has a […]

Upgrade Your Linux UniFi Controller Version in 5 Minutes


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 ...


Postfix 2.9 Upgrade 6
I’ve previously written a how-to for compiling Postfix from source on a CentOS 5 box.¬†I recently tried following the same steps on a CentOS 6 box, to upgrade from Postfix 2.6.6 which is installed by default. I’m glad to report that the same instructions will work just fine to upgrade […]

Building Postfix 2.10 on RHEL6 / CentOS 6 from Source




74
UPDATE 7/11/15:¬†The following procedure will work on RHEL/CentOS 7, 6, and 5 systems to upgrading from those¬†systems’ default versions to Postfix 3.02. CentOS (a non-commercial clone of RedHat’s RHEL) is my server operating system of choice because it’s extremely stable and widely-used. One of the reasons it’s so stable is […]

Building Postfix on RHEL / CentOS from Source




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