In case you’re wondering why new packages are being installed when we are only supposed to be upgrading applications, some new software packages may have become part of this Linux distribution, or some upgraded applications may rely on extra packages that are not yet installed. In this example, 166 packages are being upgraded, and 6 new packages are being installed. Below that, yum lists the various packages which it has found updates for.Īt the tail end of this output, yum will display the “Transaction Summary,” which shows the total number of packages that are to be installed and upgraded. The screenshot below shows the type of output you’ll typically see when first issuing the yum update command.Īs you can see, the output from yum first lists the repositories it’s querying, which are the default ones for CentOS: AppStream, Base, and Extras. When running this command, yum will begin by checking its repositories for an updated version of the software your system currently has installed. If you run the command without any package names specified, it will update all packages on the system. You can use the yum update command to update applications installed on a system.
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