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Author: Rumi

Hasan T. Emdad is an ICT Solution Architect, Project Manager with 12+ year expertise in HW selection, OS expertise on Linux and MS, Supervising Application SW on Pearl, Java, dot Net and PHP with DB experience of MySQL, Postgre, MS and Oracle. He was involved in setting up several Turn Key ICT including Telecom based projects on various government and autonomous bodies in the country. Developed more than 50 applications running with different operators and users. Managing a team of more than 10 in-house engineers and developers and manages an outsourcing team experts and contributors. Very recently engineered Public Key Infrastructure (PKI) on Enterperise and Root Certifying Authority and deployed scalable Cloud Computing and Managed Services. He has post graduated (MBA) from University of Dhaka, Bangladesh.

Install Discourse on Ubuntu 20.04

Rumi, November 14, 2022

Secure the Server Turn on automatic security updates. $ sudo dpkg-reconfigure -plow unattended-upgrades Setup a firewall with ufw. $ sudo apt-get install ufw $ sudo ufw default allow outgoing $ sudo ufw default deny incoming $ sudo ufw allow 22 comment ‘SSH’ $ sudo ufw allow http comment ‘HTTP’ $ sudo…

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Monitor Service Port if Down execute a Bash Script

Rumi, November 14, 2022

#!/bin/bash HOST_NAME=”127.0.0.1″ HOST_PORT=”1656″ if ( (exec 3<>/dev/tcp/${HOST_NAME}/${HOST_PORT}) 2> /dev/null); then echo -e “PORT: ${HOST_PORT} | ON” else cd /home/rumi/my-app/ && `node service.js` fi exit;

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Cacti user creation with specific graphs permission

Rumi, November 4, 2022

As an admin of cacti you can anything and everything. However, at certain times, you need to create restricted user who has access to only certain graphs of the cacti system. So here goes the steps (this is based on cacti version 1.2.21)- From left menu select Configuration > Users

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Set Up a Radius Server on pfSense

Rumi, November 2, 2022November 5, 2022

Installing the Package The pfSense 2.X package manager includes both FreeRadius and FreeRadius2 as installation options. For this example, I’m going to be using FreeRadius2 since it has some additional features not found in the previous version. Only one version of radius can be installed on pfSense at a time….

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Mapping drives with Windows for Nextcloud

Rumi, November 2, 2022

To map a drive using the Microsoft Windows Explorer: Open Windows Explorer on your MS Windows computer. Right-click on Computer entry and select Map network drive… from the drop-down menu. Choose a local network drive to which you want to map Nextcloud. Specify the address to your Nextcloud instance, followed…

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Install MariaDB 10.3 on CentOS

Rumi, October 23, 2022

Step 1: Add MariaDB Yum Repository  Create a new repo file /etc/yum.repos.d/mariadb.repo and add the below code changing the base url according to the operating system version and architecture. # vi /etc/yum.repos.d/mariadb.repo [mariadb] name = MariaDB baseurl = http://yum.mariadb.org/10.3/centos73-amd64/ gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB gpgcheck=1 Step 2 – Install MariaDB Server Let’s use the…

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PFSense SNMP Configuration

Rumi, September 9, 2022

Open a browser software, enter the IP address of your Pfsense firewall and access web interface. In our example, the following URL was entered in the Browser: https://192.168.15.11 The Pfsense web interface should be presented. After a successful login, you will be sent to the Pfsense Dashboard. Access the Pfsense…

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Allow Ping on PFSense WAN interface

Rumi, September 9, 2022

This article shows you how to allow ##ping## on the WAN side of your pfSense firewall. By default, ping to WAN address is disabled on pfSense for security reason. However, you may want to allow ping for different reasons, here is how: # Login to pfSense # Open Firewall >…

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Install Percona Monitoring and Management using Docker

Rumi, September 9, 2022

You can any distribution for installation- Rocky/Alma/CentoS 8 Stream. I assume you’ll use anyone of these instance. Step 1: Add Docker Repository Docker is not yet available on default repositories. Thankfully, an official repository has been provided by developers and we are going to add it first to the system….

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CentOS 7 Server Installation with Software RAID

Rumi, September 4, 2022

Install the Operating System Boot from the USB flash drive and select Install CentOS 7 When the welcome screen of the CentOS installer appears, choose your language and just click on Continue

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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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Apache Bind Cacti CentOS CentOS 6 CentOS 7 Debain Debian Debian 10 Debian 11 Debian 12 DKIM Docker icinga iptables Jitsi LAMP Letsencrypt Linux Munin MySQL Nagios Nextcloud NFS nginx openvpn pfsense php Postfix Proxmox RDP Softether SSH SSL Ubuntu Ubuntu 16 Ubuntu 18 Ubuntu 20 Varnish virtualbox vpn Webmin Windows 10 XCP-NG zimbra

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