rpm command

How do I list file stored inside a rpm file?

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How do I find out my JDK version under Ubuntu Linux operating systems? How do I find out JDK version under any Linux distribution?

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How do I uninstall or remove Webmin software under Linux / UNIX operating system?

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Cacti is a network graphing tool similar to MRTG. How do I install and configure common options to collect SNMP data and various other data (such as system load, network link status, hard disk space, logged in users etc) into an RRD?

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The best protection against vulnerable software is running less software. How do I find out which services are enabled at Boot under CentOS / RHEL / Fedora Linux? How do I disable software which is not needed?

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How can I use yum to download source packages instead of manually downloading every single package from RHN / CentOS / RedHat Ftp website?

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Q. I know how to update my system using yum command. But how can I find out that patch has been applied to a package? How do I search CVE patch number applied to a package under Red Hat / CentOS / RHEL / Fedora Linux?

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