Linux

Flashcache on Proxmox

8 August 2014

Flashcache is a kernel module released by Facebook engineer back in April 2010 to speed up database I/O on a standard rotational drive with the speed of SSD. Since it works by caching filesystem blocks, so it can speed anything on the slow rotational disk. We’ve already use RAID10 with SAS disk on all of our […]

Proxmox building ceph and ceph module

8 August 2014

Introduction Ceph is a distributed object store and file system designed to provide excellent performance, reliability and scalability – See more at: http://ceph.com Ceph’s RADOS Block Device to be used for VM disks. The Ceph storage services are usually hosted on external, dedicated storage nodes. Such storage clusters can sum up to several hundreds of nodes, […]

Bypassing Bad fstab Failure When Booting Linux

28 July 2014

Bypassing Bad fstab Failure When Booting Linux Usually you can enter root password and try to edit fstab, but it wouldn’t let you edit. because its read-only mode. so here is the method to work-around that. If /etc/fstab file is created with errors or the hardware configuration changes such as adding hard disks, Linux will boot into failure […]

Softaculous No longer any icons in cpanel

3 July 2014

Softaculous Top Apps In the cPanel category for Softaculous – the top 10 (or whatever) icons are missing. It only has a link to “Auto Installer” where previously it showed 10 or so script icons. This issue sometimes occurs when cPanel is updated and the cPanel theme files are replaced. But the CRON fixes the […]

How To Install Vesta Control Panel on Centos 6 / Ubuntu 12.04 LTS

20 June 2014

How To Install Vesta Control Panel on Centos 6 / Ubuntu 12.04 LTS   Introduction Vesta is an easy to use open source web hosting control pane that currently supports Ubuntu Linux (12.04 LTS, 13.04 and 13.10), Debian 7, CentOS (5 and 6), and RHEL (5 and 6). It packs a bunch of features by default […]

SMF Forum Showing Blank Screen / Not Working

23 March 2014

PROBLEM: You tried installing Simple Machines Forum software (SMF) either from the source website or using Fantastico, but it shows as a blank page when you try to access it. No issues are seen in the cPanel Error Log and all other configurations appear to be correct. SOLUTION This issue is caused by suhosin security […]

Install Linux Malware Detect (LMD) in RHEL CentOS

1 December 2013

Install Linux Malware Detect (LMD) in RHEL CentOS What is Malware? Malware is called malicious software, script or code which is created and used by hackers to retrieve information of private data or gain access to any private computer systems. Malware can be trojans, viruses, spyware, adware, rootkits or any other malicious programs which can be […]

Replicating block device with DRBD on Centos 6

30 November 2013

Replicating block device with DRBD on Centos 6 How to configure DRBD on CentOS 6 DRBD® refers to block devices designed as a building block to form high availability(HA) clusters – Distributed Replicated Block Device This is done by mirroring a whole block device via an assigned network. Distributed Replicated Block Device can be understood as network based raid-1.   Distributed Replicated Block […]

Flashcache on CloudLinux and CentOS and OpenVZ or SolusVM

24 November 2013

Flashcache on CloudLinux and CentOS and OpenVZ or SolusVM Major issue on a hosting server which serve hundreds of website is remain the same: I/O bottleneck. My curiosity began when I received a newsletter from a VPS provider in US, they said they have added SSD as filesystem cache to their server fleet. Flashcache is a […]

Subfolder to Subdomain with .htaccess

10 September 2013

Convert Subfolder to Subdomain with .htaccess For Example, if you have your url is “http://domain.com/sexy/” and “http://domain.com/files” but you want to convert them all to subdomain too. such as “http://sexy.domain.com” and “http://files.domain.com”. The easiest way to convert folder to subdomain is to use .htaccess, Reconfigured your ServerAlias in Apache Virtual host and add a wildcard A […]