Category: How To’s

Learn | Teach Open Source Technologies

How to install Check_mk to monitor IT infrastructure — CentOS

Check_MK is an extension to the Nagios monitoring system that allows creating rule-based configuration using Python and offloading work from the Nagios core to make it scale better, allowing more systems to be monitored from a single Nagios server.

How to install & configure GITLAB CI/CD on your own Server — Ubuntu 16.04

GitLab is an online Git repository manager with a wiki, issue tracking, CI and CD. It is a great way to manage git repositories on a centralized server. GitLab gives you complete control over your repositories or projects and allows you to decide whether they are public or private for free.

What is GRSecurity

Grsecurity® is an extensive security enhancement to the Linux kernel that defends against a wide range of security threats through intelligent access control, memory corruption-based exploit prevention, and a host of other system hardening that generally require no configuration. It has been actively developed and maintained for the past 15 years. Commercial support for grsecurity…
Read more

Linux Family reached 99.4 % as Super Computer Operating System —

According to  in June 2016 Linux family has gained the usage up to 99.4 % as Operating System for Super Computing platform or HPCC.

How to configure ICINGA2 Monitoring server on CentOS / RHEL 7

Before we start to configure ICINGA2 we need to ensure that LAMP is installed on our machine. SELINUX Setup view /etc/selinux/config sed -i ‘s/SELINUX=enforcing/SELINUX=permissive/g’ /etc/selinux/config reboot

How to enable and use EPEL Repo in RedHat / CentOS Linux

Red Hat Enterprise Linux 7 / CentOS 7 rpm -ivh yum update

Setting up custom domain in OSClass

Please go to your server root and open config.php to setup custom domain cd /var/www/html/

How to install FFmpeg, FLVTool2 and MP4Box on Ubuntu 14.04

  root@www:~# sudo add-apt-repository ppa:mc3man/trusty-media root@www:~# sudo apt-get update root@www:~# sudo apt-get install ffmpeg gstreamer0.10-ffmpeg root@www:~# which ffmpeg /usr/bin/ffmpeg root@www:~#