Redhat Linux

How to install Chromium Web Browser on RHEL7 Linux

Objective The objective is to install latest Chromium Web Browser on RHEL7 Linux. Operating System and Software Versions Operating System: - Redhat Enterprise Linux 7.3 Software: - Chromium Version 58.0.3029.110 Fedora Project (64-bit) Requirements Privileged access to your system will be required. Difficulty EASY Conventions
Read More...

Gorilla Password installation on CentOS/Redhat 7 Linux

Gorilla Password safe application is not part of CentOS/Redhat 7 package repository and thus it needs to be installed manually on your Linux system. First, let's take care of the prerequisites. Here we assume that you have already enabled EPEL repository : # yum install tcllib tk itcl git In the next step we are going to clone a current Gorilla Password repository using git command: $ cd /tmp/ $ git clone https://github.com/zdia/gorilla.git Once we get Gorilla Password sources cloned locally...
Read More...

Generating a Kickstart file on Redhat Linux

Objective The objective of this article is to provide a getting started guide to Kickstart file creation on Redhat Linux. Operating System and Software Versions Operating System: - Redhat 7 Requirements Privileged access to your Redhat Linux system may be required. Difficulty MEDIUM Conventions
Read More...

How to clone KVM-based Virtual Machines on Redhat Linux

Objective The following instruction will explain how to clone KVM-based Virtual Machines on Redhat Linux from command line using virt-clone command. Operating System and Software Versions Operating System: - Redhat 7.3 Software: - libvirtd (libvirt) 2.0.0 Requirements Privileged access to your Redhat Linux installation will be required. Difficulty EASY Conventions
Read More...

How to remove KVM-based Virtual Machines on Redhat Linux

Objective The following instruction will explain how to completely remove KVM-based Virtual Machines on Redhat Linux from command line using virsh command. Operating System and Software Versions Operating System: - Redhat 7.3 Software: - libvirtd (libvirt) 2.0.0 Requirements Privileged access to your Redhat Linux installation will be required. Difficulty EASY Conventions
Read More...

Configuring Virtual machine automatic start on Redhat Linux host

Objective The objective is of this article is explain how to automatically start virtual machine using default Redhat's KVM based hyper-visor configuration. Operating System and Software Versions Operating System: - Redhat 7.3 Software: - libvirtd (libvirt) 2.0.0 Requirements Privileged access to your Redhat Linux installation will be required. Difficulty EASY Conventions
Read More...

Configure default KVM virtual storage on Redhat Linux

Objective The default KVM virtual storage location is /var/lib/libvirt/images meaning, that any new virtual machines created via Virtual Machine Manager will be stored within this location. The objective of this guide is to configure another default KVM virtual storage directory location. Operating System and Software Versions Operating System: - Redhat 7.3 Software: - libvirtd (libvirt) 2.0.0 Requirements Privileged access to your Redhat Linux installation is required. Difficulty EASY...
Read More...

How to configure Virtualization on Redhat Linux

Objective The following quick guide will help you setup Redhat Enterprise Linux server as a virtualization host using KVM. Operating System and Software Versions Operating System: - Red Hat 7 Requirements Privileged access to RHEL installation will be required. Difficulty EASY Conventions
Read More...

How to disable default Apache welcome page on Redhat Linux

Objective The objective is to disable the default Apache (httpd) welcome page on Redhat Linux Operating System and Software Versions Operating System: - Red Hat Enterprise Linux Server 7.3 (Maipo) Software: - Apache/2.4.6 (Red Hat Enterprise Linux) Requirements Privileged access to your RHEL server system will be required. Difficulty EASY Conventions
Read More...

Configure local network Redhat package repository over HTTP with Apache

Objective The objective is to configure network Redhat package repository accessible via HTTP protocol. This guide uses Apache webserver as a means to provide HTTP access to the local package repository. Operating System and Software Versions Operating System: - Red Hat Enterprise Linux Server 7.3 (Maipo) Software: - Apache/2.4.6 (Red Hat Enterprise Linux) Requirements Privileged access to your RHEL server system will be required. Difficulty EASY Conventions
Read More...

How to force text mode installation of Redhat Linux

Objective In case you have troubles with GUI RHEL installation, Redhat also offers text bases solution. Operating System and Software Versions Operating System: - Redhat Linux 7.3 Requirements Redhat Linux bootable CD/DVD or USB media. Difficulty EASY Conventions
Read More...

Configure local network Redhat package repository with vsftpd

Objective The objective is to configure network Redhat package repository accessible via FTP protocol. This guide uses vsftpd as a means to provide FTP access to the package repository. Operating System and Software Versions Operating System: - Red Hat Enterprise Linux Server 7.3 (Maipo) Software: - vsftpd: version 3.0.2 Requirements Privileged access to your RHEL server system will be required. Difficulty EASY Conventions
Read More...

How to check Redhat version

Objective The objective of this guide is to provide you with some hints on how to check system version of your Redhat Enterprise Linux (RHEL). There exist multiple ways on how to check the system version, however, depending on your system configuration, not all examples described below may be suitable. For a CentOS specific guide visit How to check CentOS version guide. Requirements Privileged access to to your RHEL system may be required. Difficulty EASY Conventions
Read More...

Docker installation on RHEL 7 Linux

Objective The objective is to install Docker engine on Redhat 7 Linux using native docker script. Requirements Internet connection as well as a privileged access to your Redhat 7 Linux is required. Difficulty EASY Conventions # - requires given command to be executed with root privileges either directly as a root user or by use of sudo command $ - given command to be executed as a regular non-privileged user Instructions Install docker Installation of docker using a native docker script is one...
Read More...

Unbound cache-only DNS server setup on RHEL 7 Linux

Introduction Unbound is a validating, recursive, and caching DNS server. Having said that, Unbound DNS server cannot be used as an authoritative DNS server, which means it cannot be used to host custom domain name records. As a result, if your goal is to build a cache-only or forwarding DNS server, Unbound may be your preferred choice, as it does just that and it does it well. Objective The objective is to provide quick and easy to follow installation and configuration guide for the Unbound...
Read More...

How to disable last login message on RHEL Linux

Objective The objective is to permanently disable a last login message after user terminal or ssh login on Redhat Linux. Example: $ ssh linuxconfig@10.1.1.45 linuxconfig@10.1.1.45's password: Last login: Tue Dec 6 11:23:11 2016 from 10.1.1.3 Requirements Privileged access to your Redhat Linux server. Difficulty EASY Conventions # - requires given command to be executed with root privileges either directly as a root user or by use of sudo command $ - given command to be executed as a regular...
Read More...

RHEL7 - user is not in the sudoers file error

Objective By default the regular user does not have an ability to execute commands with root privileges. As a result the following message will appear: $ sudo -i [sudo] password for linuxconfig: linuxconfig is not in the sudoers file. This incident will be reported. The objective is to gain a superuser ( root ) access on Redhat 7 Linux server using sudo command. Requirements Privileged root access to your Redhat 7 Linux server installation. Difficulty EASY Conventions # - requires given...
Read More...

How to mount CD/DVD ROM on RHEL 7 Linux

Objective The objective is to mount a CD/DVD block device with ISO 9660 disk image/media. Requirements Privileged access to your Redhat 7 system. Difficulty EASY Conventions # - requires given command to be executed with root privileges either directly as a root user or by use of sudo command $ - given command to be executed as a regular non-privileged user Instructions Locate Block device First we need to find a correct CD/DVD block device. To do this execute a command blkid : # blkid...
Read More...

How to reset the root password in RHEL7/CentOS7/Scientific Linux 7- based systems

Objective Resetting the root password in RHEL7/CentOS7/Scientific Linux 7 Requirements RHEL7 / CentOS7 / Scientific Linux 7 Difficulty MODERATE Instructions Things have changed in the RHEL7 world and so has the preferred way of resetting the root password. Although the old way of interrupting the boot process (init=/bin/bash) still works, it is no longer bulletproof and recommended. 'Systemd' uses 'rd.break' to interrupt the boot. Let's have a quick walk through the whole procedure.
Read More...

Creating a Redhat package repository

Introduction If your Redhat server is not connected to the official RHN repositories, you will need to configure your own private repository which you can later use to install packages. The procedure of creating a Redhat repository is quite simple task. In this article we will show you how to create a local file Redhat repository as well as remote HTTP repository. Using Official Redhat DVD as repository After default installation and without registering your server to official RHN repositories...
Read More...