Category Archives: computers

Are you Secure when you browse the web ?

Hi All,

I have a question today?

How fussy are you to which Wi-Fi signal you connect?  i.e., connecting to an open or a secure Wi-Fi connection.

As we know that most of the Coffey shops and pubs allow you to use the free Wi-Fi open connections. Do you even think twice before connecting to a open Wi-Fi signal?

Please put some time to understand what is the risk involved in using an open Wi-Fi connection.

I know getting internet connectivity when your out and about will look like a blessing. However all your data and your laptop itself can be compromised by anyone connecting to open Wi-Fi connections.

Some people think that having a Anti-Virus program or an Firewall enabled laptop will keep them safe, what they don’t know is when they setup the connection with an open Wi-Fi connection they have already established a trust relation with that router.

Windows 7 gives warning to the user that its very risky to connect to a Open and un-secure Wi-Fi networks yet most of the people I know still connect anyway.

Moreover I know a couple of friends who bought a wireless router and started using it without setting up of security key or changing the default admin password. Read the rest of this entry

Memory Support in Windows – Kernal v User Virtual Addressing

Last week I was on a workshop by Microsoft it was for troubleshooting performance issues on Servers.

One of the interesting thing which I came across in the workshop was about the memory management  and the way Windows handles the memory.

By default Windows allocate’s virtual address space to User mode and Kernal mode, Windows assumes that it has 4 gb of virtual address space and it splits it into two half.

ie. 2 GB virtual address space to Kernal and 2 GB virtual address space to User

We can tweak it and  allocate virtual address space to programs 1 GB to the kernel and to executive component.

This is how you can do it:

First un-hide the hidden files and folder make sure you unhidden the Operating system files too.

on the root directory ie C drive you will find boot.ini file take a backup of it on keep it safe.

Edit boot.ini and add \3GB at the end Read the rest of this entry

How to Virtualize Your Computer

Last Friday I have virtualized my Windows XP Laptop, before I start telling you guys, how its done I think its worth mentioning why I need to do it?

We normal Virtualize the physical server that are very old and start getting faults very often or they are too big for us to keep in our data centres.

I have dual booted my laptop with Windows 7 ’64 bit’ edition, Which works brilliant. However Win7 is as this is 64 bit version of Windows I had to work around quite a few applications which I use on daily basis to get them work on Win7.
However the most important software which I need to work from home is the vpn client provided by CISCO. The VPN client is yet to be rewritten for Win ’64 bit’ CPU. As a result I could not use Win7 to work from home, as I was unable to install VPN client to deil.

Now you can guess why I virtualized my Windows XP OS. Read the rest of this entry

Where in the World is Ibrahim Quraishi?

 

I haven’t had a chance to write a new post in a while because I’ve been busy working at Orange. I am mostly involved in managing and maintaining Microsoft Windows 2k and 2k3, however we still have some of the legacy WinNT 4.0 nightmares every now and then. I have been working on HP Open View Operations version 8 involving some auditing on our servers.

I have finally become Expert in configuration of iLo Management Boards for the HP Bladservers also have had training by HP for HP BladeSystem Administrator

I am also quite keen on learning to use the magic of BladeLogic, ( running jobs for package deployments)

Apart from that I’ve been playing with VM Ware ESX server and also the VM Ware Infrastructure 2.0 managing quite a lot Virtual Machines, should admit Virtualization is really good fun. I am looking forward for training on VM Ware which will give me an insight how this technology mingles with the physical hardware.

In my spare time I have started working on Linux Administration, I have recently build a CentOS Server which is the exact binary of the Red Hat Enterprise Linux. Not to forget that this is a free distribution unlike RHEL, the good thing about this Linux version is this is quite robust unlike Fedora family.

My next experiment on another famous brand of Unix system called FreeBSD, Although it took me considerable amount of time to figure out the terminology of the Operation system itself.

Yes how can I forget to mention!  just creating a simple user is also a nightmare on this Unix flavor. Thus I have decided that I will be loyal to Mr Red Hat. J

In addition to this, I have few trainings lined up which I am looking forward for.

Microsoft Windows 2003, February 23 -27, London, UK

Microsoft Windows Server 2008, March 17- 20, Bristol, UK

Virtualization VM Ware, April, Reading, UK

Finally before I my end my blog today some updates on my personal,  I recently got engaged on 26 Jan, yeh that’s right India’s Republic  day.

More update on my wedding which is not too far will be coming soon. …

If you wish to contact me or have any comments feel free.

Get more done by working Smarter!

Working as a System Analyst is very exiting job, but if your not smart enough! It can become a little boring.

let me give you a simple example, I was doing some of the housekeeping of the Servers that we support, which involved me to do a series of task on each Server, you might be thinking that’s not a big deal !

well reconsider it once more  if you have to do that task 300 times, the same steeps on all the Servers (if you have 300 Servers) or if you have to do a task several time a day on few Servers, Now that  can get very tedious job, and off course can become boring too.

the only solution around this problem  is scripting or Coding or Programming.

Ok hang on are you one of the guy who likes to keep away form programming like me ?

Well in all honesty,  I use to say that programming is not my peace of cake as I am a system Admin, but let me give you another example.  As you’re the Administrator you are been told to create a user account for a new starter, well if he just needs the domain access your job is very easy as you just need to create one user at the Active directory dome controller. But if you need to give him logon locally access you have to create a local account on each of the Server, if you have  300 Servers, then its not wise to logon each server and careate a user.

Ok now you will need a method or a script to do that job for you, You do not need to be an expert to do it, you should just know, want to be done.

Dint get it ?

I know scripting sounds scary isn’t it,  don’t worry you do not need to learn every thing, Scripting is very simple, its a set of commands which you want to do. If your very lucky you can find a ready to use code on the internet, all you got to do now is download it and edit it according to your need then please do not forget to test before you implement. once your convinced that the script is doing the exact job as you wanted.

Wala

Believe me it does make our life a lot easy

so if your need to do a task more then once which can take 10 minutes each time you do it.

Try to write a Script.

if you  have to do a series of admin tasks on several computers

 Try to write a script

If you want to run a particular task at a time when you wont be in the office or it simply does not need any monitoring.

Again try to write a script.

just write a simple script and keep it. so wheen you need to do it again you can just execute that code and it will do it for you

Magic isn’t it J

Ok this is how you can work smatter rather then harder

I have gathered some useful links which is worth watching.

Special thanks to my friend Nathan who has not only given me this idea but helped me by going through some of the scripts which he wrote earlier, now I have managed to do the same task with in a matter of minutes just by working smarter.

Hear are some of the links you can find useful other wise just use Google

 

 

You will find a lot of new scripting tools like windows Power Shell, and other useful software and technical articles for making the Admin task easy by scripting

Microsoft TechNet :

http://www.microsoft.com/technet/scriptcenter/default.mspx

 

Scripting: Your First Steps

http://www.microsoft.com/technet/scriptcenter/topics/beginner/firststeps.mspx

 

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