Openstack

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 to provision …Read More

MySQL Backup

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 the Problem
B/1 Examining the Logs​

B/1.1 Page Corruption​

B/1.2 …Read More

Make Samba Go Faster

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 I saw …Read More

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 …Read More

CSF ConfigServer Firewall

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 your firewall …Read More

20 IPtables Examples For New SysAdmins

Configure FirewallD in RHEL/CentOS 7 and Fedora 21/22

In a previous post I’ve showed how to disable firewalld and roll back to our favorite post-systemd iptables firewall. In this post we gonna see how to Configure FirewallD in RHEL/CentOS 7 and Fedora 21/22.

Firewalld is a dynamic daemon to configure and manage firewalls (iptables rules typically) with support for …Read More

Chmod all files to 644 and all folders to 755 of a directory

Chmod all files to 644 and all folders to 755 of a directory

Why to chmod ? Using suPHP or FastCGI you gonna notice that they need special permissions. In dso for example 777 is the default. Having those permissions using suPHP is first

dangerous and secondly
not recommended

Especially when almost all providers forbid 777 when using suPHP. So we need to change permissions at …Read More