This will install all updated candidates making your CentOS installation current. Loading mirror speeds from cached hostfile Let us now install the updated candidates onto the rdc]# yum check-update For this tutorial, we will assume this a production system that will be facing the Internet with no production applications that needs to be tested by DevOps before upgrading the packages. yum check-updateĬhecks for packages that can update candidates. This has really taken a load off the CentOS administrator compared to the old days of compiling every application from source-code. YUM 'automagically” checks for out-of-date dependencies, in addition to out-of-date packages. YUM has brought software installation and management in Linux a long way.

We will first completely update our installation and then install an application. In this chapter, we will be working from a clean CentOS install. We have briefly touched this topic in previous chapters. YUM is the tool provided for package management in CentOS. With this in mind, we will first explore package management in the terminal, then touch on using the graphical package management tool provided by CentOS.

Updating and installing packages for CentOS is no different. More often than not a majority of a CentOS administrator's time will be using the terminal. Package management in CentOS can be performed in two ways: from the terminal and from the Graphical User Interface.

Package manager linux