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Category: Administrations

Reset user password of Discourse

Rumi, May 21, 2021May 21, 2021

Discourse is an excellent platform- super fast, super organized and super fresh looking. It has quite standarized and additional security options in the application UI. However, found a freat issue of updating any user of this platform as Admin (I was havign difficulties of self user password reset options, as…

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How to remove Virtualbox extpack

Rumi, May 19, 2021

The following commands show examples how to list extension packs and remove one: $ VBoxManage list extpacks Extension Packs: 1 Pack no. 0: Oracle Virtual Machine VirtualBox Extension Pack Version: 4.1.12 Revision: 77218 Edition: Description: USB 2.0 Host Controller, VirtualBox RDP, PXE ROM with E1000 support. VRDE Module: VBoxVRDP Usable:…

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Install webmin on Centos 7 using Yum

Rumi, May 15, 2021

Create and open this new file using your text editor: sudo vi /etc/yum.repos.d/webmin.repo Then add these lines to the file to define the new repository: nano /etc/yum.repos.d/webmin.repo [Webmin] name=Webmin Distribution Neutral #baseurl=http://download.webmin.com/download/yum mirrorlist=http://download.webmin.com/download/yum/mirrorlist enabled=1 Save the file and exit the editor.

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Reset lost root password on Ubuntu 18.04/20.x

Rumi, May 15, 2021

Boot Into GRUB menu The first step is to reboot into the GRUB menu. If Ubuntu 18.04 Bionic Beaver is the only operating system installed you need to keep pressing SHIFT for the GRUB menu to show up.

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Install LAMP with PHP-FPM on Ubuntu 20

Rumi, April 4, 2021

Step 1 – Installing Apache Apache web server debian packages are available under the default repositories. Login to your Ubuntu system with sudo privileges account. Open a terminal and execute the following commands: sudo apt update sudo apt install apache2 libapache2-mod-fcgid The above commands will install Apache and FastCGI module…

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Upgrade Python 2.7 to 3.6 and installing pip on CentOS 7

Rumi, April 2, 2021

Installing Development Tools Development tools are required for building Python modules. To install the necessary tools and libraries type: sudo yum groupinstall ‘Development Tools’ Enable Software Collections (SCL) Software Collections , also known as SCL is a community project that allows you to build, install, and use multiple versions of…

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Install wkhtmltopdf 0.12.5 on Centos 7

Rumi, April 2, 2021April 2, 2021

Install Dependencies yum install fontconfig libXext freetype libpng zlib libjpeg-turbo libpng libjpeg openssl icu libX11 libXext libXrender xorg-x11-fonts-Type1 xorg-x11-fonts-75dpi Install wkhtmltopdf sudo yum install -y https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox-0.12.5-1.centos7.x86_64.rpm Test wkhtmltopdf http://www.google.com google.pdf Src:: https://otodiginet.com/software/tools/how-to-install-and-using-wkhtmltopdf-on-centos-7/

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Configure DomainKeys- DKIM (OpenDKIM) with Postfix on CentOS 7

Rumi, March 31, 2021March 31, 2021

OpenDKIM is method to digitally sign & verify emails on the mail servers using public & private keys. In other words opendkim implements the DKIM (DomainKeys Identified Mail) standard for signing and verifying email messages on a per-domain basis. DomainKeys are implemented to reduce the chances of outgoing mails to…

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Install LibreNMS Monitoring Tool with Nginx on Ubuntu 20.04

Rumi, March 30, 2021March 30, 2021

First, it is recommended to update your system packages to the latest version. You can do it with the following command: apt-get update -y After updating all packages, install all the dependencies required for LibreNMS with the following command: apt-get install rrdtool whois fping imagemagick graphviz mtr-tiny nmap python3-mysqldb snmp…

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Setup mail server on centos 7 using postfix and dovecot

Rumi, March 30, 2021

Installing packages Step 1 » Assign hostname for the server using the below command. [root@krizna ~]# hostnamectl set-hostname mail.krizna.com Step 2 » Make a host entry with your IP in /etc/hosts file. 172.27.0.51 mail.krizna.com Step 3 » Now start installing packages. [root@krizna ~]# yum -y install postfix dovecot After package…

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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 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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