What is a “Virtual Machine”?*

Yesterday’s article brought up the topic of VM’s (virtual machines). The following article was one of my early Tech – for Everyone efforts, and while it references XP frequently (the main OS of the day), required only slight updating. I hope you will enjoy it.

One of the hot topics in the IT industry is virtualization ¹. Basically what this is, is software that creates an environment — on an existing PC — into which you can install (and run) another operating system [OS]; in short, running a PC on top of your PC.. which gives you two PCs. This “on top of” machine is called a “virtual machine“.

Tip of the day: Get more out of your PC by using a virtual environment.
(I must take a moment to state that it is the power of the newer generations of PCs that allow us to take advantage of machine virtualization. VM “shares” resources (CPU, RAM) with the existing install… so if you’re barely clunking along as it is, forget about VMs and click here to read my article(s) on when it’s time for a new machine.)

How can this benefit you? One of the main advantages is when you are thinking about a dual-boot install, or would like to do away with an existing dual-boot set up — say, for security reasons. Instead of partitioning your hard drive, and using FAT32 to run (boot to) either Windows 98 or XP, format your drive in NTFS, install XP/Vista/Win7, and run 98 inside the virtual environment. (I am using Windows 98 as an example. You may want to run a Linux distro, and learn about Open Source. The fact is you can run any OS that you have a license for [I believe. I have not tried to load every OS personally…])
If you do this, and create a shared folder for the VM on your ‘base OS’, you will be able to switch back and forth between the two and share files with both OS’s.

Another advantage of using a VM is, it loads much like “mounting” a disk image. You can make multiple ’snapshots’ of your VM, and load the one of your choosing. This is an absolutely fantastic method for dealing with security issues. I know several geeks who run an XP VM on their XP machine– they use the VM version for their daily surfing and usage, and as a “sandbox” for testing downloaded programs and patches/Updates. At the end of the day, they just close the VM, and when they open it again (unless they take a ’snapshot’ and Save those changes to the VM) their pristine VM loads: no browsing history, no spyware, no trace of yesterday’s activity… just a brand-new XP machine.
By keeping a copy of the VM snapshot in another location, they always have a full system backup on hand. (And all my readers know about the importance of recovery backups!)

These are just two uses and applications for virtual machines (VMs). You may be able to think of others. You are not just limited to one VM, either — but each VM (unless it is an Open Source OS, like Linux) does require a valid Product Key/license. This is not a way to cheat.

Today’s free download(s): The most popular virtual machine software is put out by VMware. The free offerings are VMware Server (don’t worry about the use of the word “server”) and VMware Player (which is a web browsing sandbox). Not only is this a flexible (highly compatible with your particular hardware) program, but VMware offers several pre-configured Open Source ’snapshots’, called “appliances”, that you can download and run without going through an OS install process.

Microsoft also offers free virtual machine software, that some people argue works better with Microsoft OS’s. From website: “Virtual PC 2007 is a powerful software virtualization solution that allows you to run multiple PC-based operating systems simultaneously on one workstation.”

Reader recommended VirtualBox is also free, and a possible alternative to Virtual PC and VMWare. Their homepage is here, http://www.virtualbox.org/.

Either way you decide, you are not making fundamental changes to your hard drive or currently installed operating system. This is just a program, like Excel or Word is a program. Simply uninstall it if you find you don’t like or need it.. but I doubt very much that you ever will– it’s just too useful and safe.

¹ (For IT types) Virtualization in the Data Center has (under the banner of the “green movement” – and because it saves money) been for several years now, an area of study and certification not to be overlooked.

* Orig post: 9/8/07

Copyright 2007-2011 © “Tech Paul” (Paul Eckstrom). All Rights Reserved.

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The Power of the (Virtual) Machine

One of the hot topics in the IT industry is virtualization. Basically what this is, is software that creates an environment — on an existing PC — into which you can install (and run) another operating system [OS]; in short, running a PC on top of your PC.. which gives you two PCs. This “on top of” machine is called a “virtual machine“.

Tip of the day: Get more out of your PC by using a virtual environment.
(I must take a moment to state that it is the power of the newer generations of PCs that allow us to take advantage of machine virtualization. VM “shares” resources (CPU, RAM) with the existing install… so if you’re barely clunking along as it is, forget about VMs and click here to read my article(s) on when it’s time for a new machine.)

How can this benefit you? One of the main advantages is when you are thinking about a dual-boot install, or would like to do away with an existing dual-boot set up — say, for security reasons. Instead of partitioning your hard drive, and using FAT32 to run (boot to) either Windows 98 or XP, format your drive in NTFS, install XP, and run 98 inside the virtual environment. (I am using Windows 98 as an example. You may want to run a Linux distro, and learn about Open Source. The fact is you can run any OS that you have a license for… except Vista.)
If you do this, and create a shared folder for the VM on XP, you will be able to switch back and forth between the two and share files with both OS’s.

Another advantage of using a VM is, it loads much like “mounting” a disk image. You can make multiple ‘snapshots’ of your VM, and load the one of your choosing. This is an absolutely fantastic method for dealing with security issues. I know several geeks who run an XP VM on their XP machine– they use the VM version for their daily surfing and usage, and as a “sandbox” for testing downloaded programs and patches/Updates. At the end of the day, they just close the VM, and when they open it again (unless they take a ‘snapshot’ and Save those changes to the VM) their pristine VM loads: no browsing history, no spyware, no trace of yesterday’s activity… just a brand-new XP machine.
By keeping a copy of the VM snapshot in another location, they always have a full system backup on hand. (And all my readers know about the importance of recovery backups!)

These are just two uses and applications for virtual machines (VMs). You may be able to think of others. You are not just limited to one VM, either — but each VM (unless it is an Open Source OS, like Linux) does require a valid Product Key/license. This is not a way to cheat.

Today’s free link(s): The most popular virtual machine software is put out by VMware. The free offerings are VMware Server (don’t worry about the use of the word “server”) and VMware Player (which is a web browsing sandbox). Not only is this a flexible (highly compatible with your particular hardware) program, but VMware offers several pre-configured Open Source ‘snapshots’, called “appliances”, that you can download and run without going through an OS install process.

Microsoft also offers free virtual machine software, that some people argue works better with Microsoft OS’s. From website: “Virtual PC 2007 is a powerful software virtualization solution that allows you to run multiple PC-based operating systems simultaneously on one workstation.”

Either way you decide, you are not making fundamental changes to your hard drive or currently installed operating system. This is just a program, like Excel or Word is a program. Simply uninstall it if you find you don’t like or need it.. but I doubt very much that you ever will– it’s just too useful and safe.

Copyright 2007-8 © Tech Paul. All rights reserved. post to jaanix

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Mailbag: reader questions answered, Apple Edition

Today I am going to answer a few questions submitted by readers, in the Q’s and their A’s format.

Q: Will the programs I have on my old Mac run on a new “Leopard” system?
A: There are enough differences in the new OS X 10.5 that some programs may need to be replaced with the latest versions that are “Leopard-compatible” (Norton AV often needs this, for example) to run at their best. The keyword is “may”: most programs will work just fine once you visit Apple Update.
Please note— if you intend to migrate your programs and data from an old machine to the new Leopard machine, make sure you have updated all the software (programs) on the old machine before initiating the migration. Leopard will/can refuse to accept programs that aren’t current.

Q: I am thinking about buying a new iMac and I was told Apple runs on Intel circuits now. Does this mean I would be vulnerable to viruses, worms and spyware like Windows? What security programs would I need?
A: While it is true that Apple runs on the same type of “circuits” as Windows PC’s now, it is not your hardware that is vulnerable to malware and hackers, but the lines of software “code” (programming) that make up your applications/programs.
Now to the second part of your question… The lines of code that make up the Mac operating system (the most recent being OSX 10.5 “Leopard”) are not currently being targeted by the bad guys.. simply because there’s too few machines running it (and the ones that are do not contain credit card number databases). However, some of the programs you would have on your Mac are being targeted for exploits– QuickTime (a media format/player) and the Safari browser, notably. (Neither of which you need, btw.)
And now the last part: as things stand, today, if you are running a fully updated Leopard machine, and the firewall is on, you really don’t need a “protection program”. That statement may not be true this afternoon, or next week, or next month (for future readers, this was written 05/19/08 ) and so you may, for peace of mind, want to install the Norton Internet Security 2008 package*.

Today’s free link: I’m keeping with a Macintosh theme today, and so today’s app is for Apple users. I don’t want it said that I never think of you guys! Watch TV on your iMac with Miro, a C/Net Editor’s Choice. Description: “Democracy Player is a free and open source internet TV/video podcast application, with a beautiful, easy to use interface. You can subscribe to any Internet TV channel, including video podcasts, video RSS feeds, bittorrent feeds, and video blogs. A built-in Channel Guide lists hundreds of channels of all types, all free to subscribe to. Browse videos, download, and watch fullscreen– all in the same application.”

* Folks, please don’t write to tell me “Norton is evil”. Read the reviews for NIS 2008. It may open your eyes.

Copyright 2007-8 © Tech Paul. All rights reserved. post to jaanix

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Run your defrag tool for a faster machine*

I am continuously surprised at how many PC users have let a year or more pass since their last defrag, or never have defragged at all. “Why is my machine slower than it used to be?” That is a very common question. It is a question with no single, or simple answer. Yet there is a single and simple step you can take which will improve the speed at which your machine reads and writes data, and which, if done regularly, will keep it at near the speed it had when it was new–it’s called “defragging” (short for defragmentation). Defragmentation remedies file fragmentation, which occurs, invisibly to you, over the course of time.

Tip of the day: It is commonly suggested that you run a defrag at least once a month. I recommend that you schedule your defrags to run automatically using Windows Scheduled Tasks tool. Set it and forget it, as the old saying goes. Here are the steps to do it:

1) Start>Control Panel, click Performance and Maintenance and then click Scheduled Tasks.
2) Double-click Add Scheduled Task to open the Scheduled Task Wizard, and then click Next.
3) Follow the wizard to set a schedule for when to run the defragmentation program (I recommend running it late at night, as it can take a while to complete), and be sure to supply a password for the account on which you want the task to run, and mark the checkbox “wake the computer to perform this task.”
4) Check the box for Open advanced properties for this task when I click Finish. On the Run line, add the drive letter for the drive to be defragged. For example, %SystemRoot%\System32\Defrag.exe c:

(This example is for XP, but you can do it in earlier–all the way back to Win 95–versions as well)

Another thing you can do is get rid of the files on your hard drive that you no longer need: such as emptying your Recycle bin and deleting your temp files (a quick, safe, and simple way is Windows Disk Clean Up tool) and there are some nice applications to automate and/or simplify this for you, such as today’s free link. Also, use Add/Remove Programs to remove applications you no longer use. Go to Start>Settings>Control Panel>Add/Remove Programs and wait for the list to “populate”. Click on those programs you are certain you have no more use for and click on the Remove button.

Today’s free link: CCleaner CCleaner is a freeware system optimization and privacy tool. It removes unused and temporary files from your system – allowing Windows to run faster, more efficiently and giving you more hard disk space.

* Yes folks, I have posted this article before. I remind you that you should run defrag once a month at the minimum.

Copyright 2007-8 © Tech Paul. All rights reserved.

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