Author: sajjanbh
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Docker: How To Get Started With Containers in Ubuntu
Are you a Software developer, or a DevOps engineer, or an IT student, or simply a tech-enthusiast? If yes, my guess is that you already know what containers are and how the Docker project is making it better. Unlike virtual machines, which run on their own kernel modules regardless of their hypervisor‘s kernel; containers utilize…
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CubLinux – Yet Another Linux Distribution
Welcome to my yet another post! If you’re a fan of Linux, then this article is definitely for you. Here, I’m going to write a little review of a new Linux distro that I’ve been using lately. I don’t know about you, but I hadn’t heard about a Linux distro called CubLinux before. It seems…
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PHP7 – What’s New and Better in PHP?
In some of my previous posts, I discussed about using PHP as part of LAMP for web application development. Well, if you haven’t noticed it already, when I said PHP, I was talking about PHP version 5 or 5.x. However, now I’m going to specifically talk about PHP7 and what new features it brings to…
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GIT – A Simple Getting Started Guide For Git
There is a term called “Git” in IT field, which may not be much familiar to most people despite being one of the most useful and handy tools in the industry. So, in this post, I’m going to cover the introduction and getting started guide for Git so that more people will be able to understand…
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LAMP-Securing Your Web Server With SSL
Hello and welcome! In my previous post on LAMP web server, I discussed about its installation and configuration inside CentOS environment. Today, I’m writing on how to setup SSL certificate in our website and other security related configurations as well. Installing SSL Certificate First of all, let’s install mod_ssl package from MOD Security. It’s done in CentOS…
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Blocking Mails Based on Subject in Zimbra
Welcome back! In this post, let’s talk about tightening our Antispam or Spamassassin in Zimbra. In real-time, there may be a serious reason for filtering and blocking mails based on subject that contain certain structures or words. Here are the steps to achieve this objective in Zimbra 8.5 and later. 1) Create a policy file inside…
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Enable Authentication In Zimbra CBPolicyd Webui
Hello there! In this post, I’m going to write about how to enable authentication in Zimbra CBPolicyd Webui. If you use Zimbra but haven’t yet used CBPolicyd, I recommend you to see me previous post where I discussed about installation and use of CBPolicyd for managing mail related rules or restrictions in Zimbra. Until now,…
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Restricting Certain Users from Sending/Receiving External Mails in Zimbra
Hello! In this post, I’m going to talk about how to configure a Zimbra server to restrict certain users from sending or receiving mails from external domains. In order to achieve this objective, Zimbra provides two alternatives: one using CBPolicyd (web based) and another using MTA restrictions (cli based). Here I’m covering both methods. First,…
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Zimbra Distribution Lists Disappearing Issue
Welcome! In this post, I’m once again going to discuss about Zimbra Collaboration Suite. This is about an incident that I recently came across, in which some of the mail distribution lists of one of our clients got automatically removed from the system. On doing some research, I learned that this type of issue was…
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Cisco UCS Mini – A Simple How-To
Hello and welcome back. Today, let’s learn about Cisco’s Unified Computing Systems (UCS) technology. If you haven’t heard of Cisco UCS before, this might be a good opportunity for you to keep yourself updated with the recent developments in IT industry. Basically, UCS is an aggregation of computing systems, virtualization, switching fabric and centralized management for deploying…