The Red Hat, Fedora, Mandrake, and Yellow Dog Linuxdistributions have an application named Yumwhich manages software installation and updates from central RPMrepositories. This makes software installation and updates trivial.Since distribution-specific Yum repositories are normally used, youknow the software has already been tested for compatibility with yourparticular distribution. Most distributions do maintain Nmap in theirYum repository, but they don't always keep it up to date. This isparticularly problematic if you (like most people) don't alwaysquickly update to the latest release of your distribution. If you arerunning a two-year old Linux release, Yum will often give you atwo-year-old version of Nmap. Even the latest version ofdistributions often take months to update to a new Nmap release. Sofor the latest version of Nmap on these systems, try the RPMs wedistribute as described in the previous section. But if ourRPMs aren't compatible with your system or you are in a great hurry,installing Nmap from Yum is usually as simple as executingyum install nmap (run yum install nmap zenmapif you would like the GUI too, though some distributions don't yet package Zenmap). Yum takes care of contacting arepository on the Internet, finding the appropriate package foryour architecture, and then installing it along with any necessarydependencies. This is shown (edited for brevity) in Example 2.10. You can later performyum update to install available updates to Nmap and otherpackages in the repository.