While most of us cannot kick someone ass like Jennifer Garner in Alias, we can at least try to use the Linux alias command effectively. An alias command is simple string substitution of one text for another, when it is used as the first word of a simple command. In this article let us review [...]
Linux
Vim editor is hands-down the best editor on Unix and Linux environment. These 10 practical tutorials will help you become proficient in the Vim editor. If you are spending lot of time on Unix environment, you should become comfortable in the Vim editor. These tutorials contain practical examples that are designed to give you a [...]
Question: I would like to understand the basics of how to write and execute Tcl program on UNIX / Linux OS. Can you explain it with a simple example? Answer: In this article, let us review very quickly how to write a basic Hello World Tcl program and execute tcl program on Linux or Unix [...]
This is how some of the popular Linux distro websites looked like when they launched initially. Thanks to the archive.org for all the screenshots. Redhat website looked pretty decent for a 1996 website. Which one of these websites did you like? 1. Ubuntu.com 2004 Screenshot 2. Debian.org 1997 Screenshot 3. Centos.org 2004 Screenshot 4. Fedora.RedHat.com [...]
Unix file and directory permission is in the form of a 3×3 structure. i.e Three permissions (read, write and execute) available for three types of users (owner, groups and others). In the output of ls -l command, the 9 characters from 2nd to 10th position represents the permissions for the 3 types of users. -rw-r--r-- [...]
Netstat command displays various network related information such as network connections, routing tables, interface statistics, masquerade connections, multicast memberships etc., In this article, let us review 10 practical unix netstat command examples. 1. List All Ports (both listening and non listening ports) List all ports using netstat -a # netstat -a | more Active Internet [...]
In our bash introduction article, we learned that a shell-script file contains list of commands to be executed by the shell interpreter. In this article let us review about shell commands and its internals. A command is a sequence of words. The first word indicates the command to be executed and remaining words are passed [...]
Similar to awk built-in variables, awk also has lot of built-in functions for numeric, string, input, and ouput operations. Awk has the following three types of high level built-in function categories. Built-in functions for numeric operations Built-in functions for String operations Built-in functions for Input Output operations For those who are new to awk, please [...]
My name is Ramesh Natarajan. I will be posting instruction guides, how-to, troubleshooting tips and tricks on Linux, database, hardware, security and web. My focus is to write articles that will either teach you or help you resolve a problem. Read more about