Question: I’ve been playing around with Linux desktop distro for a while. But, I’m very new to networking. Can you explain me in simple terms about what is an ip address and give me an example? Answer: When someone mails you a postal letter, you get it. How? Because it has an address that uniquely [...]
Linux
Several countries provides a unique identification number (for example, social security number in the USA) to the people who live in that country. This makes it easier to identify an individual uniquely. This makes it easier to handle all the paper work necessary for an individual by various government agencies and financial institutions. Similar to the social security number, [...]
Suppose ‘A’ and ‘B’ are very good friends and ‘A’ shares all his secrets with ‘B’. Now if a guy ‘C’ comes in and fakes as if he is ‘B’. Can you imagine what could happen? Yes, ‘A’ could tell all his secrets to ‘C’ and ‘C’ could misuse it. In a layman’s language, this [...]
UNIX has been regarded as the mother of most of the operating systems. Some of the popular members of this family Include : System V Release 4(SVR4) developed by AT&T. 4.4 BSD From university of California AIX from IBM. HP-UX from Hewlett-Packard. Solaris from Sun Microsystems. Linux is relatively a new member of this family. [...]
If you are interested in writing Linux system programming, you should learn all the basic library/system calls. This article has an example C program that covers a set of system calls that will help you understand the usage of these basic library calls. The example C code given below does the following: Automatically opens up [...]
Crontab command manages the cron table that is used by the cron daemon to execute the cron jobs. This article explains the various command line options of the crontab command. 1. Tweaking Other Users Crontab using Option -u -u stands for user. This should be followed by a valid username in the system. -u option [...]
I’ve compiled 25 performance monitoring and debugging tools that will be helpful when you are working on Linux environment. This list is not comprehensive or authoritative by any means. However this list has enough tools for you to play around and pick the one that is suitable your specific debugging and monitoring scenario. 1. SAR [...]
NIS stands for Network Information Service. NIS is also called as YP. YP stands for Yellow Pages. NIS is a lookup service for set of databases. The databases in this cases can be a passwd file, group file, hosts file, etc. This is primarily used as a central repository to hold all username and passwords [...]
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