Another quick tidbit I learned when one of my CentOS boxes was slow to connect via SSH. Connection happened quickly when I would connect from a box on the same router, but connecting from my home machine caused a delay of 20-30 seconds each time. The fix was uncommenting this […]
Reference
4 If you try to access the URL of your favicon.ico directly (http://example.com/favicon.ico) and your browser opens a “Save As” window instead of just displaying it, then your Apache isn’t set up to properly deliver the .ico file type. Add this line to your httpd.conf file: AddType image/x-icon .ico Don’t forget […]
Favicon.ico not loading? Add an AddType
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 ...
145 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 ...
46 There’s a lot of conflicting information out there on how to install the APC opcode cache on a CentOS 5.6 box. Here’s how I did it:
How to Install APC (Alternative PHP Cache) on CentOS 5.6
12 Like many owners of the ubiquitous Linksys WRT54G wireless router, I like to run aftermarket firmware on my device to unlock more of this router’s potential. I use one as my primary wireless router in my house, but I also use some as wireless Ethernet client bridges and wireless repeaters. […]
Bricked WRT54G with Blinking Power Light. Hard reset? TFTP? Nope ...
A while back, I noticed a recurring error in my maillog that read: postfix/smtp: certificate verification failed for gmail-smtp-in.l.google.com[74.125.53.27]:25: untrusted issuer /C=US/O=Equifax/OU=Equifax Secure Certificate Authority If you’re seeing this too, there’s an easy fix.
Fixing Postfix “certificate verification failed for gmail untrusted issuer” Error ...
38 I got a great deal on a couple of used Dell PowerConnect 5324 switches on eBay, and wanted to write down the steps I took to set them up how I liked them. Adding it to the List The first thing I did was add the Dell Service Code for […]
Dell PowerConnect 5324 Setup Tasks
If you have an email address, then it’s almost certain that you’ve had to type it into at least one online form. And if you’re like most, you’re required to do it on a regular basis. One way to help track whether that email address gets shared (and to be […]
How to use Address Tagging ([email protected]) with Postfix
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 / ...
Before proceeding with this tutorial, and at the risk of possibly overstating what is obvious to some, I want to make three things clear:
How to get DKIM and DomainKeys working with Postfix on ...
This blog post builds on the same workaround explained in my older post about how to install the 32-bit version of Dell OMSA 6.3 on a 64-bit version of RHEL / CentOS 5.5 on a PowerEdge server so you can manage a PERC 4 RAID adapter. Dell’s newer OMSA 6.4 […]
“No controllers found” fix: set up Dell OMSA 6.4 32-bit ...
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
This how-to will explain how to setup DenyHosts on a RedHat-based (RHEL, CentOS, or Fedora) Linux server to automatically add remote IP addresses that repeatedly fail login attempts to your server’s /etc/hosts.deny file in an attempt to block SSH brute force/dictionary attacks.
How to Install DenyHosts to Block SSH Attacks on RHEL ...
This blog post is primarily for my own benefit, so I have a list of the standard tasks, utilities, servers, scripts, and/or programs I like to install on vanilla Fedora / RedHat / CentOS Linux systems when I first set them up. But if you have suggestions for improving this […]
Things I Do First on a Vanilla Linux System
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 ...
If you’re using an AT&T 3G MicroCell to help boost your cell phone range, and you have your 3G MicroCell set up behind a firewall, you should set up the Quality of Service settings (more commonly referred to as QoS settings) on your router to give your voice calls the […]
Set Up QoS in Tomato or DD-WRT for AT&T 3G ...
UPDATE: If you’d like to run the newer OMSA 6.4, please read this updated blog post. If you’d rather install OMSA 6.3, then please continue! If you’re running a 64bit version of RHEL 5.5 or CentOS 5.5 on a slightly older Dell PowerEdge server with a PERC 4 or earlier […]
“No controllers found” fix: set up Dell OMSA 6.3 32-bit ...
With the later DRACs, like the DRAC III or DRAC 4, configuration can be a nightmare. I’ve even written a couple blog posts on the later dracs because of their complexity. You have to install software, manage dependencies, edit repository information, etc. It’s not easy, but it’s managable. But I […]
How to Configure or Reset a DRAC II Easily with ...
The current (as of this writing) versions of Dell’s OpenManage Server Administration software (OMSA) isn’t backward compatible with older hardware like the Dell PowerEdge 2650. However, if you want to install OMSA on a PE2650, you’re in luck. Using the Dell Linux Repository, you can have OpenManage 5.5 (which is plenty […]
How to Install Dell OMSA 5.5 on a Dell PowerEdge ...
If you’ve ever tried to reset the password on a Dell Remote Access Card III (DRAC3), then you probably already know that trying to manage a DRAC III in a Linux environment can be frustrating – especially since current (as of this writing) versions of Dell’s OpenManage Server Administration software (OMSA) […]
Reset a DRAC III using racadm on a Dell 2650 ...
This is pretty much for my own reference, so please ignore if you already know these. 🙂 Batch convert a directory of PNGs to GIF: mogrify -format gif *.png Resize everything in the directory: mogrify -resize 96x96 -colors 128 -depth 8 * Remove transparency (can make filesizes bigger, so don’t […]
My Favorite ImageMagick Commands
Since the default version of ImageMagick installed by yum on CentOS 5.5 is 6.2.something, and you want to be able to do all the cool stuff that ImageMagick 6.5.* and 6.6.* can do, you’re gonna have to compile it from source yourself. Don’t worry – it’s easy, and it works.