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Category: Collected Articles

SCP Command Syntax

Rumi, March 14, 2019

Before going into how to use the scp command, let’s start by reviewing the basic syntax. The scp utility expressions take the following form: scp [OPTION] [user@]SRC_HOST:]file1 [user@]DEST_HOST:]file2 OPTION – scp options such as cipher, ssh configuration, ssh port, limit, recursive copy ..etc [user@]SRC_HOST:]file1 – Source file. [user@]DEST_HOST:]file2 – Destination…

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Configure Apache With Self-Signed TLS/SSL Certificate on Ubuntu 16.04

Rumi, February 10, 2019

Step 1: Generating the certificate First, let’s create a place to store the file. mkdir ~/certificates cd ~/certificates Generate CSR and private key. openssl req -x509 -newkey rsa:4096 -keyout apache.key -out apache.crt -days 365 -nodes It will ask for information for the certificate request. Complete with the appropriate information. Country…

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Upgrade PHP version to 7.2 from 7.0 on Ubuntu 16.04

Rumi, February 9, 2019

Check your PHP version installed Before we start, we can simply type the following command to check the existing PHP version installed on the server. $ php -v If you installed Ubuntu 16.04 LTS, you will get PHP 7.0.30 installed on your server by running installation script from VestaCP. In…

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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…

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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…

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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…

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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…

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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

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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…

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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,…

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Myself…

Hi, I am Hasan T. Emdad Rumi, an IT Project Manager & Consultant, Virtualization & Cloud Savvyfrom Dhaka, Bangladesh. I have prior experience in managing numerous local and international projects in the area of Telco VAS & NMC, National Data Center & PKI Naitonal Root and CA Infrastructure. Also engaged with several Offshore Software Development Team.

Worked with Orascom Telecom-Banglalink, Network Elites as VAS partner, BTRC, BTT (Turkey) , Mango Teleservices Limited and Access to Informaiton (A2I-UNDP)

Currently working at Oracle Corporation as Principal Technology Solution and Cloud Architect.

You can reach me [h.t.emdad at gmail.com] and I will be delighted to exchange my views.

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