Install MariaDB on CentOS 7 Rumi, February 9, 2019 MariaDB is an open source relational database management system, backward compatible, binary drop-in replacement of MySQL. It is developed by some of the original developers of the MySQL and by many people in the community. With the release of CentOS 7, MySQL was replaced with MariaDB as the default database… Continue Reading
SSH Tunnel on PuTTY Rumi, January 5, 2019 Most of you have probably used a tunnel with an SSH connection. What you probably weren’t aware of is that you can use a dynamic tunnel to access all remote infrastructure. Furthermore, you can specify a port and a destination IP to have direct access. This process is achieved through… Continue Reading
Clean up boot partition – Ubuntu 14.04LTS-x64, Ubuntu 16.04LTS-x64 Rumi, December 27, 2018 Case I: if /boot is not 100% full and apt is working 1. Check the current kernel version $ uname -r It will shows the list like below: 3.19.0-64-generic 2. Remove the OLD kernels 2.a. List the old kernel $ sudo dpkg –list ‘linux-image*’|awk ‘{ if ($1==”ii”) print $2}’|grep… Continue Reading
DNS Forwarder and Transfer using Bind and Webmin Rumi, June 29, 2018 To point your BIND based DNS server to use OpenDNS resolvers for external resolution you need to modify the named.conf.options and add the OpenDNS resolvers as forwarders. This can be done in two ways: via the command line, Shell\SSH via a GUI if you have Webmin installed on your BIND server Shell\SSH… Continue Reading
Bind DNS Auto Slave Using Webmin Rumi, June 13, 2018June 13, 2018 The latest webmin has bug! In this tutorials I’m using webmin verison 1.801- that actually works. Don’t know if webmin team really knows are aware of the bug 🙁 So, let’s start. But before that, it’s assumed that you have webmin installed in both the servers. Configuring Webmin Server Continue Reading
PHP Session test Script Rumi, May 6, 2018May 6, 2018 I’ve just found a quality script to test php session- unless you’re in dark after some php.ini session tweaking done. To check if sessions really work you can use this code: <?php // Start Session session_start(); // Show banner echo ‘<b>Session Support Checker</b><hr />’; // Check if the page has… Continue Reading
How to disable Network Manager on Linux Rumi, May 4, 2018March 8, 2019 First Check if NetworkManager is running on Ubuntu / Debian Usually you should be using NetworkManager by default (Ubuntu 14.04), just in case you want to be sure, use this command to verify: dpkg –get-selections | grep network-manager In case there is some output like: network-manager install it is installed,… Continue Reading
Zimbra Exporting all mail addresses Rumi, April 26, 2018April 26, 2018 Exporting all addresses (mailboxes, aliases and distribution lists) is a vital tool if you have a backup MX and only want it to accept email for valid recipients. One reason for that is to stop spammers who simply use a dictionary of common names to generate recipient email addresses which… Continue Reading
Set Up Nginx Load Balancing with SSL Termination Rumi, March 23, 2018 Nginx can be configured as a load balancer to distribute incoming traffic around several backend servers. SSL termination is the process that occurs on the load balancer which handles the SSL encryption/decryption so that traffic between the load balancer and backend servers is in HTTP. The backends must be secured… Continue Reading
Install webmin in Centos 7 Rumi, March 9, 2018 Step 1 — Installing Webmin First, we need to add the Webmin repository so that we can easily install and update Webmin using our package manager. We do this by adding a new file called /etc/yum.repos.d/webmin.repo that contains information about the new repository. Create and open this new file using… Continue Reading