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In this tutorial, we will explore together and see how easy it is to install and configure Microsoft’s Windows Services For Unix (SFU) which is now already available for free. It provides a Unix subsystem and other parts of a full Unix environment on Windows NT and its successors. The subsystem included is known as Interix.

We will install SFU on a standalone Windows XP and access an exported NFS share on Debian 5. I will provide screenshots Continue Reading »

With more power comes more responsibility, this is obviously true for omnitty. Allowing to run commands on multiple servers simultaneously is really powerful and also dangerous. Imagine a time when you had to run the same commands on a number of servers and you were desperate to do it as soon as possible without leaving any of the servers or Continue Reading »

Imagine ever wanted to avoid the hassle of typing in the password while connecting to servers using ssh? Here is a really simply neat trick that will demonstrate how easy it is to accomplish it so it does not ask for password. And as a bonus, you will notice that the connection is surprisingly much faster than you originally thought. No, it is not about ssh keys Continue Reading »

This tutorial will walk you through exporting a directory so that we can read from or write to it. I will make it really simple so that in emergency situations, you are good to go within a few minutes Continue Reading »

Ever found yourself in need of knowing all or some specific incoming and outgoing network connections? There is this little utility that will just happily log inbound or outbound network conections based on rules you set up Continue Reading »

There is this cool little that helps us create map of local area network. As a bonus, we get the mac and the IP addresses of all the devices in the network. It passively listens for all network traffic and creates a image file for the network map. Continue Reading »

Tags: lan, lanmap, mac addresses, network map

Recently I had to find mac addresses of all servers in the local area network (LAN) for preseeding Debian installations using PXE (I will soon write about it). Finding them is easy with nmap Continue Reading »

Lately, I was configuring Nagios and most of the systems were on the same private IP block as the Nagios server. One of the servers was outside the LAN and I was using the allowed_hosts directive for nrpe daemons where I needed to put the external IP of Nagios server in nrpe configuration of the outside host. I fiddled with elinks and it did not work which was a bit of frustration.
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Often times, we want to send log files or other emails from command line or want to script them. In this tutorial, I will show you how to do that using two mail clients mail and mutt.

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There are times when we are faced with either making or burning iso images created by us or downloaded from internet. Most data CDs and DVDs can be accessed on multiple plateforms because they are created using the ISO9660 standard. Using the mkisofs command, we can make iso images from any file and directory structure from any point in Linux file system. To burn ISO images, cdrecord is the tool of choice and there is also growisofs that allows us to create and burn iso images in one step. Continue Reading »