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OpenVPN installer on CentOS 7

Rumi, May 27, 2023

Server Requirement: Centos 7 x86_64 Installation $ cd /tmp/ && yum install git -y && git clone https://github.com/puarudz/OpenVPN-AS-Unlimited && cd OpenVPN-AS-Unlimited/ && sed -i -e ‘s/\r$//’ centos7.sh && chmod 755 centos7.sh && ./centos7.sh Once installed go to- https://ip:943/admin login: openvpn pass: <your_password_during_installation> After first login, “Agree” to the terms. Now…

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Postfix to allow Mail Relay from a Trusted IP

Rumi, May 27, 2023

Make sure smtpd_recipient_restrictions has permit_mynetworks, something like this: smtpd_recipient_restrictions = permit_mynetworks,<more> This is the default, but if you have -o smtpd_recipient_restrictions=something on an smtpd line in master.cf then it will override main.cf setting. A sample configuration that worked for me is as below- smtp inet n – n – -…

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Install phpSysInfo on Debian/Ubuntu

Rumi, May 19, 2023

Log into the Debian/Ubuntu device Run the following commands in a terminal:# update repositories and install any available software updates sudo apt update sudo apt upgrade # install Apache HTTPD sudo apt install apache2 # install PHP components sudo apt install php7.3 php7.3-xml # download phpSysInfo wget https://github.com/phpsysinfo/phpsysinfo/archive/v3.3.2.zip # extract v3.3.2.zip sudo…

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Oracle Linux 8: How To Access the GRUB

Rumi, May 17, 2023

Reboot or start the instance. After the console screen is blank, there is only one or two seconds to press <escape key>. Press it several times as quickly as possible. If escape was pressed successfully, the Boot menu will be displayed, if not try again. Note that it is possible…

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How to unlock openvpn users

Rumi, May 17, 2023

Go to /usr/local/openvpn_as/scripts/ directory with root privileges. Reset all lockout policy lockouts now: ./sacli –key “vpn.server.lockout_policy.reset_time” –value “1” ConfigPut ./sacli start sleep 2 ./sacli –key “vpn.server.lockout_policy.reset_time” ConfigDel ./sacli start

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Install ZFS on Ubuntu

Rumi, May 17, 2023

Installing ZFS Filesystem on Ubuntu We will be using the command line Terminal application for the installation of the ZFS filesystem. To launch the command line Terminal, use the Ctrl+Alt+T keyboard shortcut. Now to install the ZFS filesystem on Ubuntu, issue the following command in Terminal: $ sudo apt install…

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Enable Password based authenticaiton in OCI compute instance

Rumi, May 13, 2023

If you want to use a password to access the SSH server, a solution for fixing the Permission denied error is to enable password login in the sshd_config file. To do this, open the file in a text editor.  This example uses the nano editor: sudo nano /etc/ssh/sshd_config In the file, find…

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Multipart Upload on OCI Bucket / Object Storage using OCI-CLI in Windows or Linux

Rumi, May 10, 2023May 10, 2023

Oracle OCI-CLI requires Python packages v 3.6 or higher. During installation it is auto installed on windows server/OS, however on Linux, there might be preinstalled Python package installed, that might need to be updated manually before running the installer. (In few cases, the installation failed and the package needed to…

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Download using multiple session with Linux CLI tool – multipart download

Rumi, May 1, 2023

Option-1: Aria2 apt-get install aria2 Usage: aria2c -x 16 [url] #where 16 is the number of connections Option-2: Axel apt-get install axel Usage: axel -n 5 url or with visual indicator- axel -a -n 5 [URL]  

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MikroTik Router SNMP Configuration

Rumi, April 18, 2023

First, you need to access the console of your MikroTik router. On the prompt screen, enter the administrative login information. Factory default access information: Username: admin Password: (No password) After a successful login, the console command-line will be displayed. Use the following command to enable the SNMP service on the…

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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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