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 Zabbix 5.x Monitoring Server on Ubuntu 20.04

Rumi,

Zabbix is a free, open-source, and high-performance monitoring tool for servers, applications, and network devices. It uses agents to collect system metrics. It also monitors standard services such as SMTP or HTTP services and supports host monitoring via SNMP, TCP, and ICMP checks. It is designed for real-time monitoring of…

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Getting started with Xen Virtualization On CentOS 7.x

Rumi,

Welcome to Getting started with Xen Virtualization On CentOS 7.x. Xen is an open-source bare-metal hypervisor which allows you to run different operating systems in parallel on a single host machine. This type of hypervisor is normally referred to as a hypervisortype 1 in Virtualization world. Meltdown and Spectre Mitigation on Xen 6.5 and…

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Install Zabbix Agent on Ubuntu 20.04

Rumi,

Zabbix agent is installed on the remote host (target) to monitor the hard drive, memory processor, etc. The agent collects data and sends back to Zabbix Server. Zabbix agents can use passive or active checks to pass information. In passive check, Zabbix server (poller) requests an agent for certain information, and the agent sends back a…

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Virtualmin create a catch-all email account

Rumi,

This tutorial will cover how to setup a catch-all email account. Once finished, it will be the default destination for any email arriving at your domain, unless overridden by another email account or alias. It assumes you have logged into Virtualmin as the root user. You can make any email…

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Implementing DKIM in Zentyal MTA with SoGO

Rumi,

To implement this authentication mechanism, you can use a third party software called OpenDKIM. These are the steps you have to follow to deploy DKIM. 1. Install the necessary packages: sudo apt-get install -y opendkim opendkim-tools 2. Create the folder for the DKIM keys: sudo mkdir -vp /etc/opendkim/keys 3. Generate the DKIM keys: sudo…

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Mounting OCI bucket on CentOS 7 Linux

Rumi,

Install s3fs-fuse In order to use this you have to enable EPEL Repository- sudo yum install epel-release sudo yum install s3fs-fuse [opc@linux8 ~]$ sudo yum install s3fs-fuse Last metadata expiration check: 0:00:41 ago on Sun 15 May 2022 05:40:13 PM CST. Dependencies resolved. ================================================================================================================================= Package Architecture Version Repository Size =================================================================================================================================…

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