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Category: Administrations

Build PPPoE server using PfSense

Rumi, June 29, 2022

Before building a PPoE system, it is estimated to assume that we’re building it on the following principal and prerequisite conditions- It’ll be a NAT PPPoE router At least 2 Interface we’ll be needing- 1 for WAN/Internet/Uplink and the other for LAN/PPoE user. A reserved LAN IP for PPPoE server…

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Enabling Ping requests to OCI Instance

Rumi, June 29, 2022

If you want to test with Ping requests you’ll need to modify the Ingress rules on the security list associated with the VCN, Subnet, network device, thing, what ever, to allow ICMP packets. Allowing ICMP traffic is not required, it’s an option. Please only take this option if you understand…

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Convert VirtualBox VM to ProxMox VE

Rumi, June 24, 2022June 24, 2022

On the VirtualBox host, launch VirtualBox Right click the VM to convert > Settings Select Storage from the left navigation Click the virtual hard disk and copy the Location value for the full path of the disk to the clipboard Right click on the Start menu > Run > type…

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Install MariaDB 10 on Centos or Springdale Linux

Rumi, June 18, 2022

Step 1: Add MariaDB Yum Repository Start by adding the MariaDB YUM repository file MariaDB.repo for RHEL/CentOS and Fedora systems. # nano /etc/yum.repos.d/MariaDB.repo Now add the following lines to your respective Linux distribution version as shown. [mariadb] name = MariaDB baseurl = http://yum.mariadb.org/10.1/centos7-amd64 gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB gpgcheck=1

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Disable ipv6 on Linux Machine

Rumi, June 18, 2022

Disable on Centos/RHEL system: 1. Append below lines in /etc/sysctl.conf: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 NOTE : To disable IPv6 on a single interface add below lines to /etc/sysctl.conf : net.ipv6.conf.[interface].disable_ipv6 = 1 ### put interface name here [interface] net.ipv6.conf.default.disable_ipv6 = 1 2. To make the settings affective, execute…

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Install Proxmox VE 7 on Debian 11 (Bullseye)

Rumi, June 17, 2022July 18, 2023

Step 1: Update Debian OS Ensure your Debian 11 (Bullseye) operating system is upgraded. sudo apt -y update && sudo apt -y upgrade Once the upgrade process is complete, reboot the server sudo systemctl reboot Step 2: Set Proxmox Server hostname Let’s set a hostname on the server sudo hostnamectl…

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Delete Old Unused Kernels in Debian

Rumi, June 17, 2022

To find out the current version of Linux kernel running on your system, use the following command. $ uname -sr Linux 4.12.0-041200-generic To list all installed kernels on your system, issue this command. $ dpkg -l | grep linux-image | awk ‘{print$2}’ linux-image-4.12.0-041200-generic linux-image-4.8.0-22-generic linux-image-extra-4.8.0-22-generic linux-image-generic Remove Old Unused Kernels…

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Install VirtualBox legacy version 5.x on CentOS 7

Rumi, June 11, 2022

Install Dependencies Install Extra Packages for Enterprise Linux (EPEL) # sudo yum install epel-release wget -y Install Dynamic Kernel Module Support (DKMS) # sudo yum –enablerepo=epel install dkms -y This will install quite a few packages: Install Development Tools # sudo yum groupinstall “Development Tools” -y

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How to Disable Network Manager on CentOS 7

Rumi, May 2, 2022

1. To disable the Network Manager service, perform the following steps: Disable Network Manager with the following commands: CentOS 6, CloudLinux 6, Red Hat Enterprise Linux 6 (RHEL), or Amazon Linux: service NetworkManager stop chkconfig NetworkManager off CentOS 7, CloudLinux 7, or RHEL 7: systemctl stop NetworkManager systemctl disable NetworkManager…

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Reset Root Password on Ubuntu 20

Rumi, May 2, 2022

Step 1: Reboot your Ubuntu 20.04 LTS Operating System and load the GRUB menu by holding the Shift Key on Keyboard The first step is to start your computer machine and keep pressing the shift button on your keyboard until the GRUB menu appears, as shown in the picture below:…

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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 squid SSH SSL Ubuntu Ubuntu 16 Ubuntu 18 Ubuntu 20 Varnish virtualbox vpn Webmin XCP-NG zimbra

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