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 Apache2, PHP 7.2 and MariaDB 10.5 on Debian 11

Rumi,

First, update all the packages of the system by below-mentioned command: sudo apt update After updating packages, now install the dependencies required by the below-mentioned command: sudo apt install software-properties-common ca-certificates lsb-release apt-transport-https Enable SURY Repository The following step is to integrate the SURY repository into our system. SURY is…

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Configure Zimbra to use SendGrid as Smarthost

Rumi,

Switch to user Zimbra su zimbra Add credentials to relay_password file: nano /opt/zimbra/conf/relay_password Add: smtp.sendgrid.net yourSendGridUsername:yourSendGridPassword Apply configuration to Zimbra postmap /opt/zimbra/conf/relay_password postmap -q smtp.sendgrid.net /opt/zimbra/conf/relay_password zmprov ms `zmhostname` zimbraMtaSmtpSaslPasswordMaps lmdb:/opt/zimbra/conf/relay_password zmprov ms `zmhostname` zimbraMtaSmtpSaslAuthEnable yes zmprov ms `zmhostname` zimbraMtaSmtpCnameOverridesServername no zmprov ms `zmhostname` zimbraMtaSmtpTlsSecurityLevel may zmprov ms `zmhostname` zimbraMtaSmtpSaslSecurityOptions…

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Linux Screen Cheatsheet

Rumi,

To create a screen screen List all the detached (running) screens with their screen IDs. screen -list Connect / Attach to a specific running screen. screen -x [screen id] While in a screen to Terminate / Stop a screen from running. Ctrl + D While in a screen to detach…

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Perfect Proxmox Template with Cloud Image and Cloud Init

Rumi,

Instructions Choose your Ubuntu Cloud Image. Here in this example will use ubuntu cloud-init image. Download Ubuntu (replace with the url of the one you chose from above) wget https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img Create a new virtual machine qm create 8000 –memory 2048 –core 2 –name ubuntu-cloud –net0 virtio,bridge=vmbr0 Import the downloaded Ubuntu…

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pfSense firewall rules for WhatsApp

Rumi,

For simplicity, you can also follow the step by step instructions from your pfSense WebGUI below: 1. Create a PORT alias: Firewall -> Aliases -> Ports -> + AddName: WhatsAppPortsTCP Port: 443 -> + Add PortPort: 5222 Save (bottom) -> Apply Changes (top right) 2. Create a URL alias: Firewall -> Aliases –…

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Install Softether VPN Client on Linux

Rumi,

Download and Install SoftEther VPN Client Download SoftEther VPN Client software from their official website (https://www.softether.org). Navigate to Download — > Download SoftEther VPN Click on Download SoftEther VPN link. Select Component : SoftEther VPN Client Select Platform : Linux Select CPU : Select the appropriate CPU from the Drop…

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