RHCE – rough notes

page 4: systemctl –type=service list all running services: systemctl –list-units –type=service list all services, running and not running: systemctl –list-units –type=service page 6: lists the units that this unit depends on: systemctl list-dependencies UNIT shows what other services depends on the following unit: systemctl list-dependencies UNIT –reverse this forcefully disables […]Read more »

The screen command

useful for: collaboration: 1. share screens with colleages 2. long running jobs. e.g. cp 100GB to an NFS. You can monitor progress by going back the screen. https://www.lynda.com/Linux-tutorials/Manage-terminal-sessions-screen/618702/729627-4.html

What are the advantages of using Hashicorp Consul?

Consul is actually a 4 services combined seamless into a single service. that have been combined into one. These individual services are: Service Discovery: All boxes (mysql servers, apache servers, ntp server, api servers…etc) will have the consul agent deamon running on them which will notify the consul server of […]Read more »


Take the RHCE Quiz This article is part of our RHCE Study guide (click on the yellow tab on the far left). By the end of this article you should be able to answer the following questions:

Samba – Set up private group folders RHEL/CentOS 7

A common scenario is to provide a samba share to a particular group of people, where each group member has full read+write access to all the content stored in the Samba share. You can follow along this article using our Samba group collaboration vagrant project on github. There’s a few […]Read more »

NFS – How to set up an NFS client on CentOS/RHEL 7

Network Files System (NFS) is a protocol that let’s one Linux box (NFS server) to share a folder with another Linux box (NFS Client). On the NFS client this shared folder looks like just an ordinary folder. NFS only works in an internal network so you can share folders over the public internet.

RHCE – Setting up an Apache Web Server (httpd) on CentOS/RHEL 7

In this series of articles we’re going to set up an Apache Web Server and walkthrough the various Apache configurations and features. To start with this article will cover setting up a basic Apache server with the default out-of-the-box apache configurations.