Technology Insights

Install Or Upgrade One Application From coreutils Package On CentOS Linux

Yesterday I needed to upgrade a single application on CentOS Linux. First I figured out that the application was part of the coreutils RPM package which is currently only available up to version coreutils 5.97-23 on CentOS. The current coreutils package is already up to coreutils 8.5 and upgrading coreutils is near impossible on CentOS because of other package requirements that it needs. Below are instructions on how to download the coreutils source, build the coreutils applications in a new directory, and then upgrade one application.

Technology Insights

Find Out What Applications Are Installed From An RPM Package On Linux

Earlier today I was upgrading some packages on a CentOS Linux server and was curious what applications were actually installed with the coreutils RPM package. I knew that this was one of the main RPM packages that had a ton of various applications installed with it however I was not sure specifically which ones. Below are some examples of how to use RPM to find out exactly what is installed with a specific RPM package.

Technology Insights

What Linux RPM Package Installs Sort

Earlier today I ran into an issue where I needed an updated version of “sort” on a server running CentOS 5.4. Since sort is not a package available via yum I needed to first find out what Linux RPM package includes sort to see if there was an upgrade available. To find this out you can use yum as shown in the example below.

Technology Insights

iPhone 4, iOS4: iPhone Stuck In Headphone Mode Even When No Headphones Present

Today I got some condensation on my iPhone 4 and immediately afterwards it appeared that the phone was not working properly. Finally I figured out that the issue was simply that the phone thought that headphones were plugged into it when in fact there were no headphones plugged in. This caused numerous issues including the touch screen sounds to not be heard, me to not hear when people called me though they could hear me, the iPod to not play through the speakers, and any other sounds that you would hear directly through the iPhone speakers. After tooling around with the headphone jack I was able to get this working properly again as explained below.