The Linux Juggernaut

Recently we need to find RAM(aka Physical memory) used by a User.. I thought its bit easy to find RAM usage by using a group of commands and chaining them to get desired output. Let me explain what I did to get RAM usage of a user and came to know its blunder mistake to go in that way to find the RAM use by a user. Join me to dig in to this and … Continue Reading

In this post I am going to teach How to use DIG and with examples.

DIG is one of the most important tool in debugging DNS server related issues.

Some points to be noted about DIG.

1.DIG full-form/abbreviation is Domain Information Groper

2.DIG can work on command line or as well in batch mode

3.DIG supports Internationalized Domain Name(IDN) convections too.

4.DIG is more advanced than older tools such as nslookup and … Continue Reading

How to log DNS server activity?
Ans : Sometimes you require to log DNS server activity to a file for future reference for analyse the activity on DNS server and whether DNS server is properly resolving accurately or not. rndc(remote name daemon control) is the command to use for DNS server activity logging. Let’s have a look how to log DNS server activity. In order to log DNS server entries just execute below command … Continue Reading

There are so many tools to monitor network such as MRTG, now I am going to explain such tool which monitors bandwidth for a system, ie vnstat(view network statistics). Its very much easy to install and configure.

This tool can give you full details about how much bandwidth used on the basics of,

Per month.

Per week.

Per day.

Per hour.

Per second.

Even we can see live traffic. This is awesome tool .… Continue Reading

NETWORK MONITORING/ INFO GATHERING TOOLS IN LINUX.
1.Why we have to monitor Network ?
Some times we have to monitor Network traffic in our LAN if there is any traffic issues such as “Broadcast Stroms”. Here I am going to explain some Linux tools which are used to monitor network traffic.

I used to struggle a lot initially to use these tools.

Network monitoring tools can be divided in to three types :

1. Traffic monitoring

… Continue Reading