Archive for April, 2015

In this article we will learn how to configure a router to work as a DHCP SERVER for computers or printers or any end devices connected with different Router and located in a different network.So in below diagram you can see the topology which i have created in cisco packet tracer and now i am going to  configure Router R1 such that it will act as a DHCP SERVER for machines connected with Router R2. I mean i will configure router R1 in such a way that it can automatically assign ip addresses to PC2 and PC3 which are connected with router R2 and in a different network.Hence in this article you will see one router is acting as a dhcp server for pc connected with other router.

Here i assume that you people already know how to assign ip address on router interfaces and you have also knowledge of routing.If you are new and you don’t know how to configure ip address on router interface and you have no idea about routing then you can read my other articles in CCNA section.

You can also Read:


This article is just for fun to CCNA Learning students or networking learner.But with fun you can learn how to configure static routing to such topology and how to decide how many networks are in this topology.Since i have been providing CCNA TRAINING from last 5 years i have seen that so many ccna learning students get confused when i insert switches between routers.They failed to decide correct number of network and what should be the ip address of interfaces of routers.Thats why i have decided to write articles on all such topology with configurations so that students get benefited from it.If any one of you have any topology like this which is complicated and which bothers you, you can send the topology diagram to me and i will answer your question with configuration here. (more…)

This tutorial is all about LVM SNAPSHOT .Please Don’t think that it is a substitute of media backup,no it’s not.LVM Snapshot features provides the ability to  create virtual images of device at a particular instant without causing any service interruption. so you can also say that Snapshot copies of a file system are just a virtual copy and not a media backup for file system.snapshot features requires a minimal amount of storage.3-5% of the original capacity is enough to store and maintain snapshot data.

Also read:

lvm configuration in Linux.

Now what happen when change is made to original device after a snapshot is taken?

Answer is snapshot features make a copy of the changed data area as it was prior to the changes so that it can reconstruct the state of the device.


SLASHROOTDOTIN my YouTube Channel where you get my video tutorial on CCENT CCNA LINUX RHCSA RHCE RHCSS RHCVA RHCA CEH WORDPRESS DRUPAL C C++ PERL Programming Python Programming Ruby Programming JOOMLA LAMP OSCOMMERCE etc for free.You can get the few important video list on my video-tutorial page which you can see in the righ side of this site.


Today in this tutorial i am going to mention the few important difference between RHEL6 and RHEL7 version.If someone had already completed RHCE certification on RHEL6 version this article will help him/her to easily learn the RHEL7 and get adjusted with this Latest RedHat Enterprise Linux OS.The major issue with new OS is that we don’t know whether our previous command will work on this OS or not or we have to learn it from start once again.Here i want you to confirm that you dont need to do RHCE Training again if you already know RHEL6.



Here in this article we will learn to troubleshoot OSPF routing protocols.In previous article we have learnt how to configure ospf routing protocol.And now in this section we will learn how to troubleshoot ospf routing protocol and to do so we have taken example lab of our previous LAB in which i have shown you ospf configuration.In this tutorial we will learn how to troubleshoot  and display ip route,routing table,ospf neighbors detail,parameters of protocols running on the routers,ospf information related to routers interfaces,ospf states,ospf events,ospf packets,border and boundary router information. (more…)

In this article we will learn how to configure ospf routing protocol  in a complex network.OSPF(Open Shortes Path First) Routing can be done on any router it is not a cisco proprietary.Since it is an open standard it will run on most of routers.OSPF uses SPF algorithm to provide a loop free topology.OSPF is also a classless protocol.OSPF is complex to configure and troubleshoot.Here we will learn ospf routing protocol configuration through an example lab.I am going to Create a topology.See below to design topology diagram in your cisco packet tracer.

OSPF routing Protocol configuration is slightly different from EIGRP and RIP.

Router(config)# router ospf process_ID
Router(config-router)# network IP_address wildcard_mask area area_value



Today in this tutorial we learn how to configure a EIGRP on a cisco router.If you are a CCNA student then i hope you very well know how to configure it and you have configured EIGRP in cisco packet tracer so many times.But here in this article i will show you how to configure EIGRP on cisco routers for a complex network. (more…)

In the world of computer  data is more important and with increase in internet users it’s increasing very fast and hence now storing data is most challenging task.Now it is not good to store your data on single drive when you know your data is important,because in case of disk failure your data will loss and it will be a huge disaster.So in place of storing data on a single disk it will be intelligent decision to store your data on multiple disk such that if one disk fails your data is still safe on second disk.

Also Read:

How to configure and Delete LVM in Linux.

There are two technology or you can say there are two methods commonly used to store data on multiple disk:

(1)One is to strore data on multiple disk through RAID and

(2)other is through LVM.

Since LVM provides us more flexblity  in handling disk and managing data,so most of us prefer configuring LVM.

In This article i have mentioned how to create and configure mirrored logical we learn the fundamental concept of LVM Mirroring and also learn to create,manage ad maintain LVM mirror in Linux in few simple steps. (more…)

In this article we learn how to create an LVM striped logical volume that stripes data accross the disks and it is very similar to RAID-O.Here we will learn all the methods to create and configure a striped LVM.Striped Logical Volume Increases the performance because with striping I/O can be done in parallel.Striping enhance the  performance by writing users data to a predetermined numbers of physical volumes in round robin fashion.It also improves the efficiency  of the data I/O for large sequential reads and writes.This Lab will help you to understand LVM configuration and also makes you to learn and grab the configuration of striped logical volume.

Also Read: How to Configure and Delete lvm in Linux (more…)

In this article we will learn how to Create,See,Mount,Use and Delete a partition in RHEL6 linux without reboot.In RHEL5 we use PARTPROBE command to update the changes made in partition table but in RHEL6 PARTPROBE command doesn’t work, in RHEL6 we use PARTX command.Here in this article we see step wise how to create,configure,manage,mount,use and delete a partition in RedHat Enterprise 6 Linux.In this article we also learn how to create an extended partition in linux and then how to create logical partition in linux and use it to store data. (more…)

This article is for Engineering graduates for helping them in their college and University project work and guide them to choose projects.In this section i have included USB Device projects for students to submitt as their minor or majot project.I will mention everything required in this project step wise and i will also include topics to cover in this project and which will helps students to prepare their project report.


Learn to configure RIPv2 on a complex network having six routers.To make you learn to configure even very complex routing easier i have taken this example Lab having six routers and four switches.I found many students during their ccna training very easily configure routing having two routers or three routers but when they have to solve or configure a network having more than four routers they get confused while routing.Even some of students get confused in assigning correct ip addresses and detect proper network.Here in this Lab i have taken a little complex example and solve it in few simple steps.This will help ccna learning students to configure and understand complex network easily.If you are preparing for CCNA Exam this article is for you. (more…)

This article is all about Linux interview questions.In this article i have mentioned only LVM related interviews questions.It will be helpful for all those students who wants to start their career in Linux Field as a Linux System Admin.This article will help you to explore lvm little more and indepth.I have tried my best to include all LVM related interview question in this single article.If you are already a system admin I request you to post LVM related questions in comment section if any question left. (more…)

If you are a linux user or a linux system admin then you face the sockets related problems almost daily while configuring your linux servers or during monitoring running services in your linux machine.In this article i am going to write how to know detail information about linux sockets running on your Linux server or computer.In this tutorial you will learn how to display raw sockets,unix sockets,udp sockets,tcp sockets,ipv4 sockets,ipv6 sockets,listening sockets.We will also learn how to see socket memory usage,process using socket and to see intenal tcp information using ss command in Linux. (more…)

Here in this article i am going to mention a detail article on “aureport” linux tool. This tool is used produce summary report of audit system logs and in this way help us to solve many complicated analysis.So here we will see how to use aureport command to see linux audit reports. (more…)

In this article we will learn how to provide port security to cisco switches.As we all know bydeafult switches ports are on and hence there is always a risk that some intruders or someone evil minded in your department who is in physicaly in touch of your switches can do something harmful or disaster.By using port security a network admin can bind port with device mac-addresses and hence no any other device can be now connected on that port.In this way we can put a limit that only an authorised device can access the port.

Here in this article i will mention how to configure port security on cisco switches step wise. (more…)

In this article we will learn how to configure ripv2. So basically this is a complete and step wise tutorial to make you learn configuring Routing Information Protocol version 2.Since we know RIPv2 support subnetting,that’s why i have taken an example with subnetted ip to show ripv2 configuration here.RIPv2 configuraton in Cisco Packet Tracer

                                                                 Subnetting (more…)

Learn how to configure static routing when your router is connected with each other using serial port.Here to make you learn static routing configuration lab easily i have taken a little complex example and configured them step wise.If you are preparing for ccna certification exam this lab will help you to understand and configure static routing.

You can Also Read:

How to configure EIGRP Authentication on cisco routers
static routing configuartion on cisco router using serial port.
How to configure loopback interfaces on cisco router
static routing configuration using 3 routers


static routing using serial port (more…)

Learn how to configure ripv1(Routing Information Protocol) over cisco routers.In this tutorial we will learn how to configure rip over routers.So here using one example i will demonstrate how to configure routing information protocol step wise.This article will help you if you are preparing for ccna certification exam or learning networking.Hence you can easily learn how to configure rip on a cisco router using a cisco packet tracer.In below example i have taken three routers to perform routing information protocol configuration lab.I have also mentioned all commands needed to troubleshoot rip. (more…)