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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.

osTicket Automated Install Script

Rumi, December 13, 2021

osTicket is one of the leading open source ticketing systems. Here’s an easy way to spin up an instance on Ubuntu. Note: This script is purely intended for use in short-lived demo systems. The passwords are obvious (password !?) and there is no hardening applied to any of this system….

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Configuring SMTPS in Virtualmin

Rumi, December 13, 2021December 13, 2021

Under System Settings > Server Templates (and under the dropdown menu “Edit template section”) > Mail client auto-configuration. In the section Thunderbird auto-configuration XML, under the heading outgoingServer, I changed the port from $SMTP_PORT to $SMTPS_Port and selected XMLtemplate below as opposed to Automatically generated. My XML template is therefore…

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Mapping drives with Windows Explorer in Nextcloud

Rumi, November 26, 2021November 26, 2021

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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Redirect HTTP to HTTPs automatically in Zimbra 8.8

Rumi, November 26, 2021

The most popular out of 5 options for proxy services, is to redirect. To do this, you can run the following as zimbra user: zmprov ms `zmhostname` zimbraReverseProxyMailMode redirect This will redirect your URLs to the zimbra hostname based HTTPs. Now, restart the proxy services: su – zimbra zmproxyctl restart…

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Reset Zimbra Admin Password

Rumi, September 29, 2021

Obtain a list of all Administrators If want to get a list of all administrators, run the next command: su – zimbra zmprov gaaa To reset the administrative password: su – zimbra zmprov sp <admin email address> <new password> Check the new password in the Admin Console To access the…

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Install SmokePing on CentOS 7

Rumi, August 6, 2021August 7, 2021

This tutorial explains how to install Tobias Oetiker’s Smokeping into /opt/smokeping on a CentOS 7 box. Features of Smokeping: – Best of breed latency visualisation. – Interactive graph explorer. – Wide range of latency measurement plugins. – Master/Slave System for distributed measurement. – Highly configurable alerting system. – Live Latency…

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Configure Debian Software RAID 1 during installation

Rumi, August 6, 2021

Step 1 Perform normal installation process up to the disk partitioning menu. Step 2 Select manual partitioning method in the disk partitioning menu. Step 3 Create empty partition table on each disk used to create RAID1 array.

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Softether Linux Client using Bridged with Softether VPN Server

Rumi, August 2, 2021

It’s assumed that you already have a vpn server deployed in your network, created user, password and enabled bridged network during vpn server configuration. A sample snippet of VPN Server Bridge enabled is below- So here’re the setup value- On Softether Server IP- 103.146.221.30/24 and Gateway- 103.146.221.1 Client Server IP-…

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Install ONLYOFFICE Document Server with Nginx on Debian 10

Rumi, August 1, 2021

Step 1 – Install Packages Dependencies In this first step, we will install some packages dependencies needed by the Document Server, including the RabbitMQ-server, Redis, and Nginx-extras. Update your Debian system repository and install Document Server packages dependencies using the apt command below. sudo apt update sudo apt install redis-server…

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Proxmox VM auto start VM after found in shutdown state

Rumi, July 30, 2021July 30, 2021

I was having this strange issue, where a running busy VM stopeed all of a sudden due to high CPU or Memory overload issue. So manually had to start everythime. In order to avoid this, created a small script to start the VM in case if it’s down. #!/bin/bash #…

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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 endian icinga iptables Jitsi LAMP Letsencrypt Linux Munin MySQL Nagios Nextcloud NFS nginx pfsense php Postfix powerdns Proxmox RDP SSH SSL Ubuntu Ubuntu 16 Ubuntu 18 Ubuntu 20 Varnish virtualbox vpn Webmin Windows 10 XCP-NG zimbra

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