CentOS Howtos and Tutorials

Centos Linux tutorial for beginners and advanced users with special focus on security, firewall, web, mail, file and proxy servers in an enterprise environment (rss feed).

Is there is a tool that can provide me a maximum of information (such as cpu, disk I/O, network, nfsd, memory and more) about my Linux/Unix server in a minimum of space in a terminal?

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I am a new CentOS / RHEL / Red Hat / Fedora Linux server user. I need to provide tidy library support using php. How do I install php-tidy on RHEL or CentOS Linux for Apache server?

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I would like to see detailed information on the history of yum transactions such as updates, deleted packages, and other information. How do I see history of yum commands on CentOS / RHEL 6.x based server? How do I undo or redo or rollback packages using yum command?

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CentOS Linux v6.5 has been released and available via repos for immediate update. The new version includes several hundred bug fixes for, and enhancements to the Linux kernel. How do I upgrade from CentOS Linux version 6.0 / 6.1 / 6.2 / 6.3 or 6.4 to the latest version 6.5?

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How do I setup and manage a virtualized environment with Kernel based Virtual Machine (KVM) in CentOS or Red Hat Enterpise Linux version 6 server on IBM server? Can you provide step-by-step commands of how to install and manage Virtual Machines (VMs) on a physical server using KVM for RHEL/CentOS version 6.4?

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I operate a small web site on Cloud server powered by CentOS Linux v6.4. I would like to encrypt my site’s information and create a more secure connection. How do I create a self-signed SSL certificate on Nginx for CentOS/Fedora or Red Hat Enterprise Linux based server?

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I am running Red Hat Enterprise Linux on IBM based system. How do I display bandwidth usage on an interface by host in real time using command line option? How do I monitor bandwidth usage in a real time on RHEL or CentOS Linux based server? How can I install iftop utility on CentOS or RHEL server using the yum command?

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