Technology Insights

Use yum on Linux to Install Previous Package Versions

When installing packages via yum the default will be to install the latest and greatest package that you request. It is possible however to install previous versions of the package by first seeing what versions of the package are available followed by a more detailed command to install a previous version.

Search Package Versions
First issue the below command to use yum yo display all versions of a package. This will only work on yum versions 8.1.X and below. See below for what to do on yum versions 8.2.X and above.


  1. yum search package_name

Technology Insights

How to Install nmap Security Scanner on Windows XP

Installing nmap security scanner on Windows XP is fairly easy. The easiest way is to download and run the nmap stable release executable file currently located here. You can verify the latest release by visiting nmap’s download page here.

Once the nmap.exe file is downloaded just double click it and choose a location to unpack the files. The easiest place would be something like c:\nmap or if you have cygwin installed you might want to do c:\cygwin\nmap. Make sure to note the location as you will need to add this to your path so you can execute it without having to be in the nmap directory.