I recently updated a development server running CentOS and ran into various minor issues including one regarding postfix being compiled with MySQL support. The development server runs ISPConfig for various virtual hosts and after upgrading all the packages on the server which included Postfix I noticed errors in the maillog. Below I describe what the error was in more detail as well as how it can easily be resolved.
The other day we were toying around with filtering out the horn noises from the World Cup matches streaming from ESPN. We found some instructions dealing with Fedora but many of the packages that were recommended were not available for CentOS. One of those packages was jack-rack which can be downloaded and installed using the information below.
Today I have been working on a project for work that involved accessing FTPS using curl. I needed the curl –libcurl switch which is not available in curl 7.15 so I needed to upgrade curl on the CentOS server I was working on. The problem is that there are not any repos with newer versions of curl available so then I set out to create my own curl RPM package. I was able to do this while learning many things along the way such as signing RPM packages. The first revision of my curl RPM package was not signed but I wanted to go ahead and install it anyway so below I explain installing unsigned RPM packages using yum.