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 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
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
Fedora Linux – Use dnf Command With A Proxy Server
How do I access and use dnf command with a web proxy server on a Fedora Linux? How do I configure dnf to use a proxy server only?
Dnf repositories (“repos”) can be accessed through standard proxy servers such as Squid or any other proxy server. You need to configure the …Read More
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 you …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
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
Fedora 22 released – how to upgrade
Grab it today. Fedora 22 is out. And just like Fedora 21, it comes now in 3 flavors. Workstation, Server and Cloud.
Download Fedora 22 Workstation
Download Fedora 22 Server
Download Fedora 22 Cloud
The spins have also been released. Spins are alternative desktop environments for Fedora and ready to run mixes like security …Read More
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
What to expect with Fedora 22
Like Fedora Linux 21, it will be served in 3 flavors. Workstation, server and cloud. Because we are dumb and we don’t know to use yum install, groupinstall and repositories. Anyway,
What to expect with Fedora 22
DNF
Goodbye yum. No not exactly, we have DNF now. What’s that? YUM renamed, or else, …Read More
Change Timezone Centos / RHEL 7 systems
Usually in Centos and RHEL 6 systems a soft link is enough to change the Timezone. On RHEL 7 a few things have change. Anyway. In this post I will show you how to Change Timezone Centos / RHEL 7 systems, plus the old way for 6.
Change Timezone Centos / …Read More
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