How to Remove Volume Group and Physical Volume on LVM

Basically, adding and removing LVM will always involves these three logical “layers” which are Physical volumes (pv), Volume groups (vg) and Logical volumes (lv). This post assumed that the Logical volumes haven’t created. In certain situation, linux administrators are required to remove the existing Physical Volume or Volume Group only. It is possible to perform […]

Prerequisites Checking Before Install Zimbra Collaboration Suite 8 on CentOS 6.3

Before you start installing Zimbra Collaboration Suite (ZCS) 8.0.1 or 8.0.2, there are a few prerequisites checking have to be performed. This is to ensure that the installation running smoothly without any interruption while saving your time to troubleshoot. I have installed Zimbra Collaboration Suite 8.0.1 and 8.0.2 on many CentOS 6.3 and i would […]

How to Upgrade Zimbra Collaboration Suite 8.0.1 to 8.0.2 on CentOS 6.3 x86_64

In previous post, i had shared the steps to setup Zimbra Collaboration Suite (ZCS) 8.0.1 Mail Server open source edition on CentOS 6.3 server. At the time this document was written, ZCS 8.0.2 is available. This document shows the upgrading of ZCS from version 8.0.1_GA_5438 to 8.0.2_GA_5569. Before perform the upgrading steps, it is recommended […]

How to Upgrade from CentOS 6.2 to CentOS 6.3

CentOS 6.3 had released on 2012-07-09 with the kernel version 2.6.32-279. CentOS is an Enterprise-class Linux Distribution derived from sources freely provided to the public by our Upstream OS Provider (UOP). For version CentOS-4.x and CentOS-5.x, it is recommend to reinstall rather than attempt an inplace upgrade from CentOS-4 or CentOS-5 to CentOS 6.3. Direct […]

How to Setup Zimbra Collaboration Suite 8.0.1 OSE on CentOS 6.3

Zimbra trusted by over 500 million users worldwide to increase productivity with a full set of collaboration tools while maintaining total control over the security and privacy of email. In this post, i will share the steps to setup Zimbra Collaboration Suite 8.0.1 (ZCS)  Mail Server open source edition on CentOS 6.3 64 bit.  ZCS […]

How to Mount a Windows Shared Folder in Linux CentOS 6.3

In this post, i will share on how to mount windows share folder on linux CentOS 6.3 server. Assumed that windows share folder has been configured properly with administrator privileged. This uses Common Internet File System (CIFS) protocol. CIFS can lets you access to shared folder and files that are remotely on the server and […]

How to Enable mod_perl on Linux CentOS 6.3

The default apache configuration installed without mod_perl. This can be a good idea in order to minimize the number of things that can go wrong. This post will covers the steps to enable mod_perl on linux CentOS 6.3. This will make Perl script be fast and increase the performance. Prerequisites: How to Install Httpd on […]

How to Secure OpenSSH (SSHD) on Linux

OpenSSH is a open source alternative to the proprietary Secure Shell software. It is also the SSH connectivity tools that allows you to remotely login, transfer remote file via scp or sftp. It was created as an open source alternative to the proprietary Secure Shell software. OpenSSH options are controlled through the /etc/ssh/sshd_config file. In […]

How to Find Default Gateway IP address on Linux

A default gateway is the node (a router) or network point on the computer network that serves as an access point and entrance to another network. It passes traffic between different subnets and networks. Computers running on the network using IP, a default gateway address is needed to reach all computers that are not on […]

How to Check Disk Read Write Speed in Linux

Measuring sequential disk performance is easy in linux as every modern Linux distribution comes with a command line utility called hdparm. Hdparm is a free tool to measure sequential disk performance which is primarily used to tune and optimize disk parameters. It is important to read hdparm man page and perform full backup before using […]

How to Fix “-bash: hdparm: command not found” on Linux CentOS 6.3

Question: When i try to run hdparm command to check to check the hard drive read and writing speed, the following error has been returned. Hdparm is a command line utility to measure sequential disk performance which is primarily used to tune and optimize disk parameters. Hdparm is free software under the BSD license. [root@centos63 […]

How to Remove a Logical Volume on CentOS 6.3/RHEL6

In previous post, i have cover the steps to create additional Logical volume manager (LVM). In certain situation, linux administrator is required to remove the existing logical volume. It is possible to perform the required task if that system administrator has the right skill on linux. Otherwise, they will put themselves and the organization in […]

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