Red Hat Package Manager (RPM) Quick Ref

RPM package database /var/lib/rpm
*.rpm – Used to install, uninstall, upgrade, query, verify a package in Redhat and SuSe Linux
rpm [option] [package_name(PN)/ package_filename(PFN)]
 
-i <PFN> : To install the package if not installed
-F <PFN> : To upgrade the package if older version already exists
-U <PFN> : To install/upgrade the package
-e <PN> : To remove the package (if [...]

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Changing Runlevels at Boot Time

Under Red Hat Enterprise Linux, it is possible to change the default runlevel at boot time.
To change the runlevel of a single boot session, use the following instructions:

When the GRUB menu bypass screen appears at boot time, press any key to enter the GRUB menu (within the first three seconds).

Press the [a] key [...]

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Nagios quick installation guide for Fedora

Introduction
This guide is intended to provide you with simple instructions on how to install Nagios from source (code) on Fedora and have it monitoring your local machine inside of 20 minutes. No advanced installation options are discussed here – just the basics that will work for 95% of users who want to get started.
These instructions [...]

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