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LFCS - Linux Foundation Certified SysAdmin - Exam Preparation Guide

Archive : CentOS

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Automated Installations of Multiple RHEL/CentOS 7 Distributions using PXE Server and Kickstart Files

Automated Installations of Multiple RHEL/CentOS 7 Distributions using PXE Server and Kickstart Files
This article is an extension of my previous PXE Boot Environment Setup on RHEL/CentOS 7 and it’s focused on how you can perform Automatic Installations of RHEL/CentOS 7, without the need for user intervention, on headless machines using a Kickstart file read from a local FTP server. The environment preparation for this kind of installation has already been processed on the previous tutorial regarding PXE Server setup, the only key missing, a...
Filed in: CentOS

Setting up a ‘PXE Network Boot Server’ for Multiple Linux Distribution Installations in RHEL/CentOS 7

Setting up a ‘PXE Network Boot Server’ for Multiple Linux Distribution Installations in RHEL/CentOS 7
PXE Server – Preboot eXecution Environment – instructs a client computer to boot, run or install an operating system directly form a network interface, eliminating the need to burn a CD/DVD or use a physical medium, or, can ease the job of installing Linux distributions on your network infrastructure on multiple machines the same time. Setting PXE Network Boot in RHEL/CentOS 7 Requirements CentOS 7 Minimal Installation Procedure RHEL...
Filed in: CentOS

Setting Up “NTP (Network Time Protocol) Server” in RHEL/CentOS 7

Setting Up “NTP (Network Time Protocol) Server” in RHEL/CentOS 7
Network Time Protocol – NTP- is a protocol which runs over port 123 UDP at Transport Layer and allows computers to synchronize time over networks for an accurate time. While time is passing by, computers internal clocks tend to drift which can lead to inconsistent time issues, especially on servers and clients logs files or if you want to replicate servers resources or databases. NTP Server Installation in CentOS and RHEL 7 Requirements: CentOS...
Filed in: CentOS, RedHat

Disable and Remove Unwanted Services on RHEL/CentOS 7 Minimal Installation

Disable and Remove Unwanted Services on RHEL/CentOS 7 Minimal Installation
RHEL/CentOS 7 minimal installation for servers comes with some default pre-installed services, such as Postfix Mail Transfer Agent daemon, Avahi mdns daemon (multicast Domain Name System) and Chrony service, which is responsible to maintain system clock. Remove Services in CentOS 7 Now comes to the question.. Why wed need to disable all these services. if they are pre-installed? One of the main reason would be to increase system security level...
Filed in: CentOS, RedHat

Installing ProFTPD Server on RHEL/CentOS 7

Installing ProFTPD Server on RHEL/CentOS 7
ProFTPD is an Open Source FTP Server and one of the most used, secure and reliable file transfer daemons on Unix environments, due to its file configurations simplicity speed and easy setup. Install Proftpd In RHEL/CentOS 7 Requirements CentOS 7 Minimal Installation Red Hat Enterprise Linux 7 Installation Configure Static IP Address on System This tutorial will guide you on how you can install and use ProFTPD Server on CentOS/RHEL 7 Linux distributions...
Filed in: CentOS, FTP, RedHat

How to Perform Graphical Installation of “Red Hat Enterprise or CentOS 7.0″ Remotely Using VNC Mode

How to Perform Graphical Installation of “Red Hat Enterprise or CentOS 7.0″ Remotely Using VNC Mode
This tutorial concentrates on how to perform a graphical installation of Red Hat Enterprise or CentOS 7.0 from a remote point in VNC Direct Mode using Anaconda included locally VNC server and how to partition a hard-disk smaller than 2TB with a GPT Partition Table Layout on non-UEFI systems. Install RHEL/CentOS 7 Remotely Using VNC In order to access the graphical installation, your remote system that will control the installation process, requires...
Filed in: CentOS, RedHat

Creating Apache Virtual Hosts with Enable/Disable Vhosts Options in RHEL/CentOS 7.0

Creating Apache Virtual Hosts with Enable/Disable Vhosts Options in RHEL/CentOS 7.0
Virtual Hosting allows Apache Weberver to serve different content based on IP Address, hostname or used port number. This guide will use a Debian like approach on enabling and managing Virtual Hosts on Red Hat Enterprise Linux/CentOS 7.0 by creating two directories on /etc/httpd/ path, which will keep all enabled and disabled website file configurations – sites-available and sites-enabled, and two types of scripts to act as commands, one that...
Filed in: Apache, CentOS, RedHat

Install RHEL/CentOS 7.0 on Multiple Servers using FTP Network Source

Install RHEL/CentOS 7.0 on Multiple Servers using FTP Network Source
This tutorial will demonstrate how you can install Red Hat Enterprise Linux/CentOS 7.0, using a FTP server (vsftpd) as Network Source. Which allows you to install the system on multiple machines from a single source point, using a minimal ISO image on the machines you perform installation and the extracted binary DVD ISO mounted on FTP server path, on the server machine that holds the source tree. Install RHEL/CentOS 7.0 Using FTP Network For...
Filed in: CentOS, RedHat
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