Category: Centos / RHEL

Installing docker with Ubuntu 16.04 LTS, Mint 17 and CentOS 7

Installing docker with Ubuntu 16.04 LTS, Mint 17 and CentOS 7 A brief introduction to virtualization Today we will learn installing docker with Ubuntu, mint and CentOS 7 Linux,  Before the evolution of the concept of virtualization, to run one application one dedicated server was required,  if you wanted to 

What is Openstack? A Quick OpenStack Tutorial

What is Openstack? A Quick OpenStack Tutorial OpenStack – History and Introduction OpenStack is a cloud operating system that controls large pools of compute, storage, and networking resources throughout a data center. All of the above components are managed through a dashboard which gives administrators control while empowering their users

MySQL InnoDB Corruption Repair Guide

MySQL InnoDB Corruption Repair Guide This is a basic guide that goes over some of the methods you can use to deal with some of the most common InnoDB corruption issues, from start to finish. SECTIONS /A/ First Response A/1 Initial Steps​ A/2 If MySQL is Crashing ​ /B/ Identifying

Make Samba Go Faster

Make Samba Go Faster After installing a wired gigabit network in my house I tested the performance in the network using shares (Windows – samba installed centos 7). I got around 500-600MBit/sec in read speeds and about 600-700MBit/sec in write speeds. But why ? After looking at the samba configuration file

Linux RAID Mdadm Cheat Sheet

Linux RAID Mdadm Cheat Sheet Mdadm is the modern tool most Linux distributions use these days to manage software RAID arrays; in the past raidtools was the tool we have used for this. This cheat sheet will show the most common usages of mdadm to manage software raid arrays; it assumes

Upgrading MySQL databases after a software update

Upgrading MySQL databases after a software update (and possibly repairing structure and tables if problems occurs)   Sometimes MySQL changes its internal database structures between versions. When that is the case, you might get these kind of errors after updating it (probably via yum) and trying to start it: [ERROR]

How to Setup ZFS Filesystem on Linux with zpool Command Examples

Messing around with FreeBSD 10 lately I loved ZFS, its simplicity and expand-ability. So I thought, what about a Linux with ZFS ? I’ll write about How to Setup ZFS Filesystem on Linux with zpool Command Examples in here.   ZFS has combined volume manager and filesystem with several advanced features.

Understanding Containers, user space, userland and kernel space

Perhaps you’ve been charged with developing a container-based application infrastructure?  If so, you most likely understand the value that containers can provide to your developers, architects, and operations team. In fact, you’ve likely been reading up on containers and are excited about exploring the technology in more detail. However, before

Install and Configure CSF ConfigServer Firewall

Install and Configure CSF ConfigServer Firewall About CSF Firewall ConfigServer Security and Firewall, also known as CSF, is an opensource software firewall application. It is working based on iptables. Firewall configuration script created to provide better security for your server while giving you an easy to use, advanced interface for managing