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Get yum ready by configuring it: (as root) yum -y install yum-prioritiesEdit the yum config file vi /etc/yum/pluginconf.d/priorities.confAdd the following line: check_obsoletes = 1Important Commands:* To see a list of available software: yum list available* To install some software, you type: yum install packagename* To update some software, you type: (''If you leave out "packagename" yum will update all your software.'') yum update packagename* To see what updates are available, you can do: yum check-update* To search for a package, you can do: yum search word