Integration · Internet · Networking · Open Source · Proxy

Proxy auto configuration for an enterprise network

Proxy servers are commonly used in corporate network. I prefer using squid proxy, probably one of the most robust, feature rich proxy servers out there. I usually use web proxy servers (squid) for end users are used for the following reason Cashing of the web contents and DNS, which helps with Internet bandwidth optimization and… Continue reading Proxy auto configuration for an enterprise network

Internet · Linux · Making things work · Networking · Open Source · security · Windows · Work · world

Essential tcp ip network tools, network Swiss army knife

Being a Network administrators, systems administrators we always like to have some tools handy to look into, troubleshoot or just to figure things out. There are many open source, free tools available specialized for different purposes In this blog I shall attempt to list some of them, give a brief description and list the available… Continue reading Essential tcp ip network tools, network Swiss army knife

Linux · Making things work · Open Source · Work

How to upgrade Cirtix Xen 5.0 to 5.5 to 5.6 to 6.0

Prefix: We have been planning to upgrade our Citrix XenServer from 5.0 to the latest version 6.0. XenServer only permits upgrades from the last major release. For example, in order to upgrade from version 5.0.0 to version 5.6, you must first upgrade version 5.0.0 to version 5.5, and then upgrade version 5.5 to version 5.6,… Continue reading How to upgrade Cirtix Xen 5.0 to 5.5 to 5.6 to 6.0

business · Linux · Open Source · Work

How to extend your LVM disk

How to extend a LVM This document is a continuation of LVM made easy, my previous blog This document is on LVM2 and assuming your Linux distribution supports LVM2 This document also assumes you have LVM setup out of /dev/sdb Volume group name is “mail-storage-group” Logical volume name is “mail-storage-lv” And we shall attempt to… Continue reading How to extend your LVM disk

Linux · Open Source · security · Work

How to securely and effectively erase a disk with DD

At times we need to clean up our disks for whatever reason, like installation errors, privacy, security or to clean up an infected file you need a special deleting procedure. Tools like regular delete only remove the inode of the file, which does not touch the data/contents. It is possible to recover these deleted files… Continue reading How to securely and effectively erase a disk with DD

Internet · Linux · Making things work · Networking · Open Source · Work

Setting up backup mail exchange server with sendmail

Setting up backup mail exchange server with sendmail Most systems admin is used to setting up the primary mail server, but many of them (like me) are not used to setup a backup mail server in a regular basis. This is my attempt to create a complete document on setting up a backup mail server… Continue reading Setting up backup mail exchange server with sendmail

business · Linux · Open Source · Work

Free Clone build of Red Hat enterprise Linux

Once upon a time (not so long ago) Red Hat Binary distribution used to free. Then they changed their business model, decided to charge for the binary and started of the fedora project where free Red Hat binary took off. Soon after Red Hat, removed freely available Linux distribution from circulation and asked us to… Continue reading Free Clone build of Red Hat enterprise Linux

business · document management · Integration · Internet · Linux · Open Source · Windows · Work · world

Email collaboration for enterprises and Zimbra

When we think about email collaboration/unified messaging the first things comes into our mind is Microsoft exchange, probably not because they pioneered email collaboration but because they have great success of with all enterprise segments, more importantly the end users to felt the impact of email collaboration. Microsoft Exchange Server 4.0 was released at 1996… Continue reading Email collaboration for enterprises and Zimbra

business · Integration · Internet · Linux · Making things work · Networking · Open Source

What is a SAN?

What is a SAN? A storage area network (SAN) is a dedicated high performance network provides access block level to Data. The in modern day data is stored in an array of hard disk drives or solid-state drive or a combination of both. This Storage area network is usually separated from the local area network for performance… Continue reading What is a SAN?

business · Linux · Making things work · Work

Turnkey Virtual Appliance

Turnkey provides ready to go linux based open source appliances.  As they prepare the appliance for in the virtual infrastructure of your choice and get the opensource applications up and running for free. While you have your options to deploy them anywhere, they provides you with paid backup and migration service to the cloud as well as… Continue reading Turnkey Virtual Appliance