{{Admon/tip|Problems Encountered When Running Yum Command|Sometimes students may experience problems when performing updates when using the '''yum''' command. Sometimes there may other processes that are running the yum application: you can check for this by issuing the <code>'''ps aux'''</code> command, and kill the process. Also, it is highly recommended to issue the command: <code>'''yum clean all'''</code> to perform a reset and clean up repository data.}}

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<li value="8">Based on the result, do you think that cups is a useful package for your system? If not, try removing it.