How to Configure FTP Server in Linux RHEL 6

In this post i will show how to install Very Secure FTP (Vsftpd) and how to configure ftp server in linux Red Hat Enterprise Linux 6 (RHEL 6). Vsftpd is a GPL licensed FTP server for UNIX systems, including Linux. It is secure and extremely fast and it is stable. As an example I will install […]

How to Check Linux System Reboot Date and Time

Question : How to check when was my linux system last rebooted and how long was the system running ? Answer : The are several command to check last system rebooted. 1. Check last rebooted using “who -b” command : [root@server ~]# who -b system boot 2014-08-16 09:34 2. Check last rebooted using “last reboot” […]

Facebook, Google, Intel, Microsoft, NetApp, Qualcomm, VMware And The Linux Foundation Form New Initiative To Prevent The Next Heartbleed

The OpenSSL Heartbleed disaster definitely opened up many people’s eyes to how underfunded and understaffed many of the open source projects the web relies on are. To prevent the next Heartbleed, Facebook, Google, Intel, Microsoft, NetApp, Qualcomm, VMware and The Linux Foundation today announced the “Core Infrastructure Initiative.” This initiative will fund and support important […]

How OpenStack parallels the adoption of Linux

In spite of its considerable momentum, there are still skeptics about whether OpenStack will ultimately succeed. My colleague tackled some of that skepticism in a blog post last year and I’m not going to rehash those arguments here. Rather, I’m going to make some observations about how OpenStack is paralleling, and will likely continue to […]

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 […]

Configure Network Time Protocol (NTP) on CentOS 6.3

As opposed to the manual setup, it is possible to synchronize the system clock with a remote server over the Network Time Protocol (NTP). NTP is an Internet protocol used to synchronize the clocks of computers or servers to some NTP server on internet or intranet. Steps A 1. To synchronization immediately or for the […]

How to Install Wireshark on CentOS 6.3

Wireshark is a free and open-source network packet analyzer that will help to capture network packets and tries to display that packet data as detailed as possible. This post will covers the quick step to install wireshark on linux CentOS 6.3. [root@centos63 ~]# yum install wireshark -y [root@centos63 ~]# yum install wireshark -y Loaded plugins: […]

How to Setup Zimbra Collaboration Suite 7.2.0 Mail Server on CentOS 6.2 x86_64

In this post, i will show you the steps to setup Zimbra Collaboration Suite (ZCS) 7.2.0 Mail Server open source edition on CentOS 6.2 64 bit. Zimbra only released the 64 bit version for Redhat Linux Enteprise 6 (RHEL6) or CentOS 6 operating system. Before you start installing ZCS software, please make sure that all […]

How to Install PHP 5.3.3 on CentOS 5.8

PHP: Hypertext Preprocessor is a widely used, free and open-source server-side scripting language that was especially designed for web development to produce dynamic web pages and can be embedded into HTML. PHP applications are commonly found with the filename extensions .php, .php4, or .php5. In this post, i will share on how to install PHP […]

How to Configure Bind-Chroot Logging on CentOS 6.2

In this post, i will show on how to turn on Bind DNS server logging in order to log all the dns queries on CentOS 6.2 linux server. Assumed that the bind9 chroot has been properly configured. 1. Create Soft link, symlink or symbolic link to /var/log : [root@ns1 ~]# ln -sf /var/named/chroot/var/log/dns.log /var/log/dns.log [root@ns1 […]

How to Add SPF Record in Bind DNS Zone on Linux

In order to prevent the,, and other top internet mail provider interpret all mails originate from your server to be spam and then placed it into junkmail folder, it is recommended to add SPF (Sender Policy Framework) in your zone file. The ISPs and email providers usually will check for SPF record […]

How to Setup Private DNS With Bind9 Chroot on CentOS 6.2 VPS

Assumed that you already buy two Virtual Private Server (VPS) but you dont want to point your nameservers on your hosting provider. To look more professional and stylish, you can run and have two private nameservers such as ns1.ehowstuff.local and ns2.ehowstuff.local. This post will show you the steps on how to setup and run your […]

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