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The Linux Juggernaut

The Linux Juggernaut

roles on……

Archive for November, 2009

SNORT(IDS/IPS) Configuration and Implemenation

Lets start how to install SNORT which is An Intrusion detection system (IDS) and an Intrusion Prevention System (IPS). We tested installation of SNORT on RHEL5.
Step1 : Download following packages
libpcap-1.0.0.tar.gz
pcre-8.00.tar.gz
libnet-1.0.2a.tar.gz (This is optional package if you want SMB popup alerts on window’s machines.)
snort-2.8.5.1.tar.gz
acid-0.9.6b23.tar.gz
Note : Don’t try to install SNORT through rpm packages, try to install them from source packages because there will be so many dependencies. And … Continue Reading
Posted by Surendra On Thursday-Nov - 19 - 2009 Add Comments READ FULL POST

How To Uninstall A Source Package?

In Linux we can install packages in so many ways such as:
#rpm –ivh packagename.ver.arch.rpm
This is to install from rpm package manager

#yum install packagename
This is installing through yum which will use rpm package manager internally
#apt-get install packagename
This is for installing .deb packages

#sh file.sh
This is from a shell script.
#./configure;make;make check;make install
This is to install from source package.
Etc. but when we want to uninstall above … Continue Reading
Posted by Surendra On Thursday-Nov - 19 - 2009 Add Comments READ FULL POST

How To Log DNS Server Activity?

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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

Posted by Surendra On Wednesday-Nov - 18 - 2009 4 Comments READ FULL POST

How To Take The Backup Of MBR(Master Boot Recorder)

1.How to take the backup and restore MBR? Why do you require to take the backup of your MBR?
Ans : MBR (Master Boot Recorder) is a vital part of your hard disk which contains booting information, without it its difficult to boot the system. Suppose you have windows and Linux duel boot on your machine and as you know windows is more prone to virus attacks. So it’s always better to backup your MBR … Continue Reading

Posted by Surendra On Friday-Nov - 13 - 2009 2 Comments READ FULL POST

Linux Ext2 VS Ext3 File Systems in Linux

ext2_ext3

The differences between Ext2 and Ext3 file systems are as follows.

… Continue Reading

Sl.No

EXT2

EXT3

Journaling

No journaling

Has journaling

Speed of file system(read-write)

Bit faster

Bit slower then ext2 file-system

Data corruption

File system may be corrupted due to unplanned reboots

Prevents file-system corruption

Way to recover data

Require fsck to recover data after unplanned reboot

Does not require(automatic file recovery is done at booting time)

Online file system growth.

By default there is no

Posted by Surendra On Tuesday-Nov - 10 - 2009 11 Comments READ FULL POST

Linux Virtual File System

Can we create a file system (i.e. formatting a drive/partition) with in a file system?
Looks little bit strange is int it? So follow me I will show you how to create a virtual partition and file system within a partition.

Step1 : Create a empty file with /dev/zero with size equal to 50Mb.
#dd if=/dev/zero of=/temp/vf0 count=102400

Note :
1. By default “dd” command(dataset definition) uses block of 512bytes so … Continue Reading

Posted by Surendra On Saturday-Nov - 7 - 2009 Add Comments READ FULL POST

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    Surendra Kumar Chowdary

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