Configuring A High Availability Cluster (Heartbeat) On CentOS Rumi, December 4, 2012 This guide shows how you can set up a two node, high-availability HTTP cluster with heartbeat on CentOS. Both nodes use the Apache web server to serve the same content. Pre-Configuration Requirements Assign hostname node01 to primary node with IP address 172.16.4.80 to eth0. Assign hostname node02 to slave node… Continue Reading
Reset root Password for Redhat/CentOS/Sl Linux 5.x Rumi, November 1, 2012November 1, 2012 You can log in using single-user mode and create a new root password. To enter single-user mode, reboot your computer. If you use the default boot loader, GRUB, you can enter single user mode by performing the following: At the boot loader menu, use the arrow keys to highlight the… Continue Reading
Zimbra 8 Community edition on Scientific Linux 6 (64 Bit) Rumi, September 15, 2012September 15, 2012 Install SL 6.3 (64 bit) Installing SL6.3 (64bit) with 'minimal' installation mode Post installing, fix with the Static IP Address (Public IP and I assume the system is not behind firewall) Double check with /etc/resolv.conf file parameters Prerequisites for ZImbra installation Let's firsy update- yum update Let's install some pckages… Continue Reading
Redhat/CentOS install PHP on NginX server as fastcgi Rumi, August 26, 2012 tep # 1: Enable EPEL repo ngnix is not included in the base system. Turn on EPEL repo to install nginx stable release: # rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/$(uname -m)/epel-release-5-3.noarch.rpm Step # 2: Install ngnix Type the following command at a shell prompt: # yum install nginx Sample output: Loaded plugins: downloadonly,… Continue Reading
Install Zimbra on Centos 5 Step by step Rumi, August 24, 2012August 24, 2012 Zimbra is a suite of tools for Unix/Linux/MacOS systems, which includes a secure mail server, web mail, anti-spam/anti-virus controls, a Web management interface, integrated calendaring, mobile device sync, and more. In many ways, Zimbra is the Unix equivalent to Microsoft Exchange. In this post, I will be installing Zimbra… Continue Reading
Install Perl CPAN on CentOS troubleshooting Net::LDAP Rumi, June 20, 2012June 20, 2012 First we need to make sure our perl modules are all there and up to date. We can do this easily by Running perl -MCPAN -e –shell Let it run. Answer “no” when it asks about Manual configuration. Once it stops you'll be at the cpan prompt….type install Bundle::CPAN this will… Continue Reading
Step by Step Zimbra 6.x installation on CetOS 5.x Rumi, June 11, 2012June 11, 2012 First you need to install a fresh CentOS operating system, keeping almost everything as default state. In this installation note I'm assuming few things- There is either a LARGE '/' partion or a LARGE '/opt' partition. Zimbra by default is installed on /opt directory I'm also assuming that the server… Continue Reading
Running Zimbra on HTTPS Rumi, June 11, 2012 1. First you need to su as 'zimbra' user 2. go to /opt/zimbra/bin/ 3. Use the following commands to enable SSL: ./zmtlsctl https ./zmcontrol restart Now it's working like a charm. For other readers: I can only access to webclient by SSL now (but that's ok for me). other options… Continue Reading
mod_jk for RHEL6 Rumi, April 20, 2012 If you have a RHEL6 box which ships both Apache and Tomcat6 you might want to connect the two together. You probably have looked around for mod_jk as a RHEL6 RPM or SRPM (src.rpm). You find that It isn't in EPEL, and it isn't in Red Hat Optional Server… Continue Reading
CentOS – Enable or Disable SELinux in command interface Rumi, December 14, 2011 From the command line, you can edit the /etc/sysconfig/selinux file. This file is a symlink to /etc/selinux/config. The configuration file is self-explanatory. Changing the value of SELINUX or SELINUXTYPE changes the state of SELinux and the name of the policy to be used the next time the system boots. [root@host2a… Continue Reading