June 2011

AWK Vs NAWK Vs GAWK

by Ramesh Natarajan on June 29, 2011

Awk is a powerful language to manipulate and process text files. It is especially helpful when the lines in a text files are in a record format. i.e A record containing multiple fields separated by a delimiter. Even when the input file is not in a record format, you can still use awk to do some basic file and data processing. You can also write programming logic using awk even when there are no input files that needs to be processed.
(more…)

{ 1 comment }

20 Tips to Simplify Your Digital and Online Life

by Ramesh Natarajan on June 27, 2011

Digital information is overwhelming. If you don’t simplify your digital life, it will take over your real life. This article contains 20 tips to simplify your digital life.

  1. Use only two email accounts. How many email accounts do you have? If the answer is greater than two, you have some work to do. You just need one personal email, and one work email. There are folks who have an email address for family, an email address for close friends, an email address for college friends, an email address for online friends, etc. They end-up spending lot of time checking these constantly. Pick only one personal email address, notify your friends and family that you’ll be using only that address, and just give-up rest of your personal email addresses.

    2. (more…)

{ 26 comments }

7 Steps to Upgrade IOS Image on Cisco Catalyst Switch or Router

by Ramesh Natarajan on June 23, 2011

Anytime Cisco releases a new IOS image for its network switch (or router), it is recommended that you upgrade it.

This article explains 7 easy steps to upgrade IOS image on a cisco switch or router.

Since you’ll be upgrading the IOS image, make sure you have physical access to the switch and you are in front of it. Use a console cable to connect to the switch.
(more…)

{ 8 comments }

7 Linux chkconfig Command Examples – Add, Remove, View, Change Services

by Balakrishnan Mariyappan on June 21, 2011

Chkconfig command is used to setup, view, or change services that are configured to start automatically during the system startup.

This article contains 7 practical examples that explains how to use the chkconfig command.
(more…)

{ 8 comments }

Happy 3rd Birthday to The Geek Stuff

by Ramesh Natarajan on June 15, 2011


(more…)

{ 126 comments }

25 Most Frequently Used Linux IPTables Rules Examples

by Ramesh Natarajan on June 14, 2011

At a first glance, IPTables rules might look cryptic.

In this article, I’ve given 25 practical IPTables rules that you can copy/paste and use it for your needs.

These examples will act as a basic templates for you to tweak these rules to suite your specific requirement.

For easy reference, all these 25 iptables rules are in shell script format: iptables-rules
(more…)

{ 12 comments }

Top 7 Free SFTP or SCP Clients for Windows (Transfer Files to Linux)

by Ramesh Natarajan on June 7, 2011

Most organizations run Linux servers for their enterprise databases and applications. However the developers and admins might have Windows laptops. In those cases, you might be using PuTTY (or related tools like PuttyCM) to ssh from Windows to Linux.

You might also want to transfer files from Windows to Linux and vice versa. You can use any one of the free SFTP clients mentioned in this article.

Even if you are already using some SFTP client, check-out these tools, you might end-up liking one of these sFTP clients better than your current one.

Did we miss any of your favorite SFTP or SCP client?
(more…)

{ 13 comments }