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Install CakePHP 3 On Ubuntu 16.04

Rumi, September 30, 2018September 30, 2018

This guide assumes you’ve set up a Ubuntu 14.04 server and have MYSQL up and running. This guide uses the “PHPMyAdmin” from the “One Click Apps” available on Digital Ocean running on a vps running Ubuntu 16.04. The smallest memory (512mb) should be enough to get you up and running….

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Converting OVA for use with KVM / QCOW2

Rumi, September 21, 2018February 18, 2019

The OVA file is nothing more than a TAR archive, containing the .OVF and .VMDK files. Easy! Using Evergreen ILS for example: ~ $ file Evergreen_trunk_Squeeze.ova Evergreen_trunk_Squeeze.ova: POSIX tar archive (GNU). I’ts possible to use the tar command to list the contents ~ $ tar -tf Evergreen_trunk_Squeeze.ova Evergreen_trunk_Squeeze.ovf Evergreen_trunk_Squeeze-disk1.vmdk Simply…

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Installing Smokeping on Ubuntu 14.04 LTS

Rumi, September 21, 2018

Installing Smokeping on Ubuntu used to be a total breeze. Since 14.04 however, it’s been a bit of a mission. This guide assumes a fresh out of the box Ubuntu install. I’m using the 64bit Server variety, but this should work on any 14.04 system. UPDATE – It also works…

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Install Rocket Chat on Centos 7with Jitsi Video Conferencing

Rumi, September 21, 2018

Add the epel repository and update everything. yum -y install epel-release nano && yum -y update Populate the yum repo with the mongodb-org repository nano /etc/yum.repos.d/mongodb-org.repo Paste this into the new file: [mongodb-org] name=MongoDB Repository baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.6/x86_64/ gpgcheck=1 enabled=1 gpgkey=https://www.mongodb.org/static/pgp/server-3.6.asc To write and save do: CTRL-O, CTRL-X Now we need to…

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Reset CentOS Root Lost or Forgotten Password

Rumi, September 21, 2018

In the event your Linux box experiences disk or file system issues you may receive a “Give root password for maintenance” prompt upon reboot. If you have your root password you can login but in the event your using ‘slide’ or ‘sudo’ for wheel access or you’ve just mis-placed your…

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Install Cacti 1.1 on CentOS 7

Rumi, September 2, 2018

Cacti is a free and open source network monitoring and graphing tool written in PHP. With the help of RRDtool (Round-Robin database tool), Cacti can be used to provide various useful features, including remote and local data collectors, graph templating, network discovery, device management automation, etc. Prerequisites A fresh CentOS…

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Fix: Unable to start TLS: SSL connect attempt failed error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed when connecting to ldap master.Cannot determine services – exiting

Rumi, September 1, 2018

My ZImbra 8.6 was throwing the following error once after my letsencrypt SSL got expired: Unable to start TLS: SSL connect attempt failed error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed when connecting to ldap master.Cannot determine services – exiting The Fix: In order to fix the problem you need to modify the following…

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Zimbra Letsencrypt SSL Renew – Zimbra 8.6

Rumi, September 1, 2018

Let’s Begin: This works if you already have an expired letsencrypt ssl certificate and assuming you have already deployed SSL in you zimbra system. However, if you come up here already, and would like to know how to setup letsencrypt on your system you may read my other article here:…

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Zimbra – deleting all email in queue by sender

Rumi, August 17, 2018January 15, 2022

As root user execute: /opt/zimbra/postfix/sbin/postqueue -p | tail -n +2 | awk ‘BEGIN { RS = “” } / sender@mail\.com/ { print $1 }’ | tr -d ‘*’ | /opt/zimbra/postfix/sbin/postsuper -d – To Delete ALL Messages From Queue /opt/zimbra/postfix/sbin/postsuper -d ALL or /opt/zimbra/common/sbin/postsupe -d ALL Another way to do this:…

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Syslog server with Rsyslog and LogAnalyzer in Ubuntu 12

Rumi, August 17, 2018

Installing Rsyslog from repository First make sure you have the latest update of Ubuntu 12.04 LTS sudo apt-get update && sudo apt-get upgrade Adding PPA repository sudo add-apt-repository ppa:adiscon/v8-devel If you get this error: “add-apt-repository: command not found” Try installing this python-software-properties package apt-get install python-software-properties Update your apt cache…

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Myself…

Hi, I am Hasan T. Emdad Rumi, an IT Project Manager & Consultant, Virtualization & Cloud Computing and Public Key Infrastructure Savvy from Dhaka, Bangladesh. I have prior experience in managing numerous local and international projects in the area of Telco VAS & NMC, National Data Center & Naitonal PKI Root and Enterprise 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) and at Oracle Corporation as Principal Technology Solution (Cloud) Architect.

And currently being employed at Huawei Technologies (Bangladesh) Ltd. as Advanced Business Development Lead (Cloud) in the south asia region.

You can reach me [h.t.emdad at gmail.com] and I will be delighted to exchange my views.

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