Systems that solve operational problems at scale.
Notes from Vignesh A S on Java, Kafka, distributed systems and AI-assisted tooling.
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Login using Active Directory credentials vSphere web client 5.5 (Domain is not listed in Permission)
VMware vCenter 5.1 and before the default behavior was to allow all domain admins to login and administrate your ESXi hosts. Once the 5.5 vCenter installed if you try and…
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Configuring iSCSI in Windows 7
Setup iSCSI Initiator iSCSI Initiator is by default installed in Windows 7. You can access it from Control Panel or Administrative Tools Click on iSCSI Initiator If the service…
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Setup iSCSI target server in Ubuntu
Setup Environment I have one Ubuntu server for iSCSI target and one Windows Machine for Initiator Target Server vignesh@vignesh-server:~$ sudo su root@vignesh-server:~$ apt-get update root@vignesh-server:~$ apt-get install iscsitarget Note :…
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VMware ESXi Logs Location and use cases
This is reference article for VMware ESXi 5.x logs, their locations and use-cases. Log File Location Description Troubleshooting /var/log/auth.log ESXi Shell authentication success and failure Security /var/log/dhclient.log DHCP client service,…
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VMware vCenter 5.5 – You do not have permission to login to the server
VMware Vcenter 5.1 and before the default behaviour was to allow all domain admins to login and administrate your ESXi hosts. Once the 5.5 vCenter installed if you try and…
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Extract host information from within a VM Self configuration and OVF Environment
The OVF in vSphere is not just about deployment and packaging. There is also a runtime part, namely the OVF environment. This is a feature that has been around since…
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Install VMware Tool in Virtual Ubuntu Guest
VMware Tools is a suite of utilities that enhances the performance of the virtual machine’s guest operating system and improves management of the virtual machine. For example, the following features…
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Setup LAMP Stack Ubuntu
This tutorial presumes that you understand what is a LAMP Server , how to deploy a web site and how to install software using Terminal and experience in running other…
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Enable / Disable VMware VAAI Plugin in ESXi Host
There are two ways to enable / diable VAAI plugin, One via command line and one via vSphere Client UI Using command line Login to ESXi using putty / terminal…
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Understanding VMware VAAI for NAS
VAAI vStorage API for Array Integration (VAAI) is a technology that VMware makes available for storage vendors to offload the storage operation like cloning , space reservation from the ESX…
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VMware VIEW Pool Error : Domain is not listed in Guest customization wizard
While adding a pool in VMware Horizon View Administrator, you may come across the situation where you get an error “unable to retrieve information from Active Directory for domain null”…
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Change OS name from Ubuntu to something
You can change the name UBUNTU to any name by modifying the file lsb-release and issue, You can find that files under etc directory vignesh@vignesh-server:~$ sudo nano /etc/lsb-release DISTRIB_ID=Vignesh DISTRIB_RELEASE=0.1…
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Setup Nested Virtualization ( ESX on ESX ) in VMware ESXi
Nested ESX / Virtualization Nested ESX / Virtualization is the ESX or any hypervisor running as a pseudo-machine, in this blog we will see how to set up ESXi 5.1…
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Placeholder in Flex ActionScript
All the modern browser or mobile apps support a placeholder for the text input field. once you click on it the focus move to the beginning of the text and…
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Base64 for images a look
Using Base64 encoded images in website Encode the image to base64 in php <?php $image = file_get_contents(“https://www.facebook.com/images/fb_icon_325x325.png”); $base64 = base64_encode($image); echo $base64; // This will echo the encoded base64 image…
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Text watermark in webpages
Adjust your rotate and font size values as per your requirement <style type=”text/css”> #asvignesh-watermark { color: #d0d0d0; width: 100%; font-size: 198pt; -webkit-transform: rotate(-47deg); -moz-transform: rotate(-47deg); height: 100%; margin: 0; z-index: -1;…
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Easiest way to check if a variable is an array in Javascript
There are lots of way to check whether the var is array or not but the easiest way is using instanceof Array Example 1 : var myName=[“Vignesh”,”A”,”Sathiyanantham”]; if (myName instanceof…
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Install a chat server in windows
Openfire is a real time collaboration server licensed under the Open Source Apache License. It uses the only widely adopted open protocol for instant messaging, XMPP (also called Jabber). Setup…
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Host website in Google Drive
Recently, Google added an exciting feature to Google Drive “web hosting!” It allows you to host a website build on html , css , js in google drive build a…
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Import SQL dump to MySQL using Codeigniter
Taking backup dump and importing the dump into database can be done very easily using php. In Last posts i explained how to take the backup of Mysql using php http://asvignesh.in/take-mysql-backup-using-php-passthru-function , http://asvignesh.in/take-mysql-backup-using-php…