Linux on VirtualBox or Standalone

[EngWiPy]

Hello,

I would like to learn Linux, but I'm not sure how to install it. I searched YouTube, and it appears that there is something called VirtualBox where you can install Ubuntu, for example, on a virtual machine from inside the Windows OS. Is this a good idea, or it's better to install it as a separate OS beside my Windows 7, and how can I do that?

Thanks

 

[eys_physics]

Hello,

I would like to learn Linux, but I'm not sure how to install it. I searched YouTube, and it appears that there is something called VirtualBox where you can install Ubuntu, for example, on a virtual machine from inside the Windows OS. Is this a good idea, or it's better to install it as a separate OS beside my Windows 7, and how can I do that?

Thanks

Yes, you can use VirtualBox (it can be downloaded at https://www.virtualbox.org/wiki/Downloads ) and install Ubuntu. This could be a good idea if you only want to test Linux, or testing different distributions before you decide. But, the performance will be worse since you will run Linux and Windows simultaneously. If you intend to use Linux as your main system I would recommend to install it beside Windows (i.e. dual-booting). A step-by-step guide can be found at https://www.ubuntu.com/download/desktop/install-ubuntu-desktop . Nowadays, it is relatively easy to install user-friendly distributions such as Ubuntu. If you are used to Windows 7 another distribution which could be of interest for you is Linux Mint (see https://www.linuxmint.com/ ) which has a user interface which is quite similar to Windows. Myself, I am using Linux Mint Debian.

 

[EngWiPy]

Thanks. Do I need to create a new partition from my only hard desk partition if I want a dual boot option, or it's not necessary? and if I need a separate partition, how much should I allocate to it the least? I have about 450 GB free space on my drive!

 

[Routaran]

Thanks. Do I need to create a new partition from my only hard desk partition if I want a dual boot option, or it's not necessary? and if I need a separate partition, how much should I allocate to it the least? I have about 450 GB free space on my drive!

Here's a video of a guy making a XP Virtual Machine in virtual box.

You will need to modify the steps. Instead of using Windows XP, you will use whatever linux distribution you wish to use.

For linux testing purposes, you just need to give the VM like 10GB. That should be plenty.

 

[john101]

You'll find that the linux distribution will take care of the partitioning and installation of a boot loader. There will be options re partition size. There are various suggestions online of what sizes to choose. If you have unused space it will select that. You can also use something like gparted to prepare the disk yourself and to resize partitions.

 

[EngWiPy]

I'm considering to download Linux as a dual boot. Is 150 GB a good choice for the partition? Probably I won't use it as the main OS. I'll be using for educational purposes, as it is obviously a desirable skill to be familiar with Linux platform in your resume! Also, what is the most popular Linux variation? For some reason I keep find Ubuntu in YouTube tutorials! I mean, is the difference between different versions significant?

 

[Routaran]

I'm considering to download Linux as a dual boot. Is 150 GB a good choice for the partition? Probably I won't use it as the main OS. I'll be using for educational purposes, as it is obviously a desirable skill to be familiar with Linux platform in your resume! Also, what is the most popular Linux variation? For some reason I keep find Ubuntu in YouTube tutorials! I mean, is the difference between different versions significant?

I would advise against a dual boot for beginners. If you're not careful, you can easily damage your windows partition. It is orders of magnitude safer to test linux within a virtual environment like Virtualbox and I strongly suggest you start there.

The most popular distributions of Linux (according to distrowatch) are Mint, Debian and Ubuntu. I suggest you start with Ubuntu or Mint. They are both very user friendly and can make process of transition easier. That said, if you really want to learn linux, the best way to do it is to use it as your main OS and struggle through those first few months. Once you're past the initial hurdle, it becomes natural quickly.

Always remember google is your friend.

 

[john101]

150 is plenty. If you only want to use as you say for now, 20 is enough. see : https://help.ubuntu.com/community/HowtoPartition .

Ubuntu is popular. Probably a good one to start with. It won't teach you anywhere as much as Arch or Slackware forces you to learn unless you want to. You can be largely ignorant of Linux with Ubuntu if you wish.

edit add : as previous poster said you can damage windows. Backup important files. Be prepared to reinstall windows.

Dive in, You have to make mistakes in order to learn.

It's unlikely there will be any problems if you follow well established guidelines found on the many posts by the thousands/millions? of others who have done this successfully.

 

[EngWiPy]

I watched some YouTube videos on how to do dual boot, and it seems straightforward and it's working well. Can I damage the windows partition through using Ubuntu after being successfully installed? or the danger is in the installation process only?

Also, Ubuntu is GUI-based, and is very similar to windows. So, where is Linux distinguished from Windows? Is it by using the commands?

 

[Routaran]

I watched some YouTube videos on how to do dual boot, and it seems straightforward and it's working well. Can I damage the windows partition through using Ubuntu after being successfully installed? or the danger is in the installation process only?

Also, Ubuntu is GUI-based, and is very similar to windows. So, where is Linux distinguished from Windows? Is it by using the commands?

Yes. It is still possible. Linux allows you to mount the windows partition and make whatever changes you feel like making. But generally speaking, you'd have to do something in order to break windows from Ubuntu. It won't do it on its own.

To discuss the differences between windows and Ubuntu we'd need to understand at what level the discussion is to take place. If we are talking about how a user interacts with the system, then they aren't all that different. There are programs that do tasks you want and you access them by clicking on them.

But if you want to have a discussion about how the operating systems carry out specific tasks, then Windows and Linux are very different.

It really depends on your perspective, really high level or fine grain.

 

[EngWiPy]

I saw people do shrinking of window drive, and use the unallocated space to Ubuntu. Is this a safe method?

What I meant about the difference, is why Linux seems to be desirable in the industry? I know it's an open source and more secure ... etc, but is there any other reason? Also, how do I say that I know Linux? By knowing what exactly? I doubt it's using Ubuntu itself as mentioned earlier.

 

[john101]

It can be safe. You have to make sure that you don't shrink it too much. Make sure you take into account windows virtual memory space. Probably a good idea to defrag windows first.

You have control, or can have control over Linux in a way that windows denies you. You don't need a gui or desktop or if you do you don't need to use it/them (you can install a number of different desktops in one Linux installation, as well as a choice of a number of different file systems when initially installing, not just one like in windows) at all for Linux to function as a very usable operating system.

You can use your total control to the max, which is where it gets fun and powerful or stock standard where it's a very good system for general use.

I've got linux only on my pc now. For win7 I've got a laptop. I can easily transfer files from one to the other. I also have an unused space on the pc drive for future mutiboots. I don't plan to install windows again on the pc but would like to try Arch or Archbang some time later.

 

[Routaran]

Resizing your windows partition is exactly the kind of thing that can get you into trouble. The manner in which windows stores data on the hard drive causes fragmentation. When you resize a partition in linux, it doesn't know if there's valuable data stored in the locations that its taking away from windows. It just takes a chunk from the end you tell it to. This can cause serious problems if important data is lost. This is why John said that you should defrag your drive. But keep in mind that doesn't guarantee anything.

I wouldn't take the risk of resizing my windows partitions without first having a full backup of my system.

There's a lot of very significant differences between Windows and Linux. Too many to list so I'll give you my two favourite. There's a philosophy in Unix/Linux, Write programs that do onething and do it well.

Freedom that the command line offers. The GUI is easy to use but you are only allowed to do what the developer allows you to do in the program.

 

[john101]

I wonder if I understand what your concern is.

You said you have 450bg free space. Is that on a windows partition? ie it is not unused diskspace in the sense of not being part of a windows partition.

There are many accounts of gparted completely successfully moving everything from a shrinked area. No one seems to guarantee it though. Many will suggest defragging first. I have done so successfully including resizing after creating a dual boot and triple boot. I do defrag first and take care that I don't shrink too much because I have and made windows unusable. Even at that point it's probably recoverable but I wasn't interested in doing so. If you do install windows again it'll recreate its own boot sector and Linux will seem gone. The boot loader can be fixed too.

Anyway as Routaran says : Backup.

If you have that much free space I wouldn't be concerned. Use Gparted to create an unformatted partition at the end of the drive, say 150 gb, partition that into for example a 20 and 130gb space and when installing linux you'll get an option of where you want the install. When finished it'll create a bootmenu from which you can boot into windows or linux. Read the distros documentation and online forums till you're ready to go.

 

[QuantumQuest]

Hello,

I would like to learn Linux, but I'm not sure how to install it. I searched YouTube, and it appears that there is something called VirtualBox where you can install Ubuntu, for example, on a virtual machine from inside the Windows OS. Is this a good idea, or it's better to install it as a separate OS beside my Windows 7, and how can I do that?

Thanks

I've spent quite a long time in multi-boot configurations, including various machines, versions of Windows and Linux distros in the past. I read up a lot of details and this https://www.amazon.com/dp/0789722836/?tag=pfamazon01-20 was of great help. Configurations with a dozen different OSs on two hard drives, had become a common thing. Windows were never friendly to multi boot configurations and partition resizing. I remember myself reinstalling Windows after letting Linux install and manage boot loading itself, because Windows became unbootable - the usual nasty message "ROOT NO VERIFY" and the like. The solution I had come up with, was to use some commercial boot and partition management software and let it manage the partition sizes and boot loaders of each and every OS I had installed, separately. So, I could create a list with "Windows", "Linux" etc., as the first boot screen and then after choosing one of them, I could choose which version / distro I wanted to load. I've experimented with GParted too. There is a lot of details involved during boot, that can easily get you into trouble if even one bit goes wrong. I totally agree to what Routaran said above. For a beginner, trying to resize partitions and create dual or multi-boot configurations, is just asking for trouble. I don't say it can't be done, but it usually needs some admittedly unpleasant trial and error procedures.

Now, things have changed in many respects, but not quite about Windows friendliness in multi-boot configurations. In my opinion, there is no need anymore to tinker with your partitions and boot of your system, as a virtual machine and its environment can save you a lot of time and trouble and help regarding security issues - like VirtualBox you mention, which I also use. Of course there is no silver bullet. Choosing this solution has its price too: Extra load for the host OS which will be negligible or not so, depending on the resources your machine can spare and some time for the whole thing to get loaded. To my experience by using it on a Win 7 machine (i3, 4GB RAM and 1TB SATA HD - somewhat old), it works like a charm. For a newer machine so much the better.

What I meant about the difference, is why Linux seems to be desirable in the industry? I know it's an open source and more secure ... etc, but is there any other reason? Also, how do I say that I know Linux? By knowing what exactly? I doubt it's using Ubuntu itself as mentioned earlier.

Linux is desirable in the industry because it's open source. It comes at no cost, for commercial services regarding support (if needed) the costs are lower than in other OSs/platforms and very importantly you can modify its source code, regarding every aspect. On top of these, it's more secure. What more freedom could anyone ask for?

Now, to say you know Linux, presupposes extensive use/development on different distros (or flavors of Linux if you will). Working through the GUIs and the various available desktops, can't get you far in this regard.One thing that I've also mentioned in other posts, is mastering the command shells. All is built on top of commands and command shells. Also, if Linux skills you want to show are beyond administration of the system, good programming skills on Linux platform are required.

 

[eys_physics]

I think that the difficulty of installing and using Linux has partly been a bit overstated. I have during almost ten years used different flavours (distributions) of Linux and installed them along different versions of Windows (Windows 7, Windows 10). To give another perspective I will give some of my experiences.

1) Nowadays, the procedure to install Linux is straightforward for the user-friendly distributions, e.g. Ubuntu, Linux Mint. Everything is done in graphical interface. Usually, the installation program will recognize that you have Windows installed.
2) As has been mentioned above you need shrink your partition in order to install Linux. This is done in the installation program, or in gparted. I have done this many times and it has never failed for me. But, I would recommend to make a backup of your files (at least the most important ones).
I recommend to create one root partition (called /) and one home partition (for your personal files). Probably, you will also be asked to create a swap partition. This is like the virtual memory in Windows. Typically, the swap space should be of similar size as your memory.
3) As I remember most of your Linux programs doesn't have write access to your Windows partition. Unless you are doing it intentionally the risk to break your Windows partition by using Linux. I never experienced this and never heard anyone doing it.
4) Linux is different in many ways. One of the advantages is the security. Usually, you use Linux as normal user and not as root (corresponding to Administrator in Windows). The programs you use will be different but you will probably learn them rather quickly. Most of the Linux distributions (such as Ubuntu) has active user communities (on forums, etc) which usually are very helpful.
5) Finally, many people thinks that they need to learn the terminal in order to use Linux. Learning using at least some basic commands for the terminal is very useful but almost all tasks can be done using graphical interfaces.

I wish you good luck with your installation. If you have any problems I will be glad to help.

 

[EngWiPy]

I watched this video, and the person who presented it tested the windows after installing Ubuntu, and it was working well. He mentioned he's never had any problem in using shrinking. He mentioned something about SSD hard drives and fragmentation in some cases. My hard drive isn't SSD.

One reason why I'm inclined to make a dual boot is performance. I don't want to make overload on my computer, and get slow performance. (my laptop is i5, 6 GB RAM, and 500 GB hard drive). It's already not that fast because I have many programs installed on it.

I thought it's straight forward, but now I'm not so sure. I don't want to damage windows. I have many programs I don't want to lose and re-install.

I think I need to read more about back ups before I do anything.

 

[eys_physics]

Yes, I agree with you concerning the performance. The way he does in the video looks okay for me. The only complain I have is that they use the automatic way to create the partitions, which give you less control. But, maybe for a newbie this is the best way.

 

[DrZoidberg]

You should at least try it out in VirtualBox before installing it for real. That way you can also practice resizing partitions. e.g. you could install windows 10 in a virtual machine and then install linux in that same machine, resizing the windows partition first. That way you can test the procedure safely.

 

[Stephen Tashi]

I would advise against a dual boot for beginners.

I advise against dual boot for non-beginners too! It's more efficient and less risky to have a computer that you can devote entirely to Linux. ( If you read Linux forums, you find many dual-booters posting things like "Help! - my Windows is gone!".)

 

[EngWiPy]

But I cannot switch entirely to Linux now. I use many programs on Windows.

 

[DrZoidberg]

Is learning linux really the main reason why you want to install it?
In that case just use a second machine, e.g. an old used desktop or laptop pc or just get a raspberry pi. Those cheap, tiny computers make a great linux system and are perfect for learning.

 

[EngWiPy]

I have just one laptop at the moment. I'm thinking to buy a new one. In that case I will allocate one for each OS.

Yes, I would like to learn Linux, and use it for different things like coding for example. In the future, if I like it and have no compatibility issues with other users, I might switch to it entirely!

By the way, what's about compatibility with windows? Like say I write a document or presentation on Linux, would I be able to run it on windows OS?

 

[Routaran]

I have just one laptop at the moment. I'm thinking to buy a new one. In that case I will allocate one for each OS.

Yes, I would like to learn Linux, and use it for different things like coding for example. In the future, if I like it and have no compatibility issues with other users, I might switch to it entirely!

By the way, what's about compatibility with windows? Like say I write a document or presentation on Linux, would I be able to run it on windows OS?

The way I got started with Linux was using virtual machines. When I first saw the beta releases for Win10 and the direction MS was taking, I was not happy and started playing around with Linux. I didn't know much about it and as most people, I threw on Ubuntu on to a VM and just played for a while.

Performance isn't as big of an issue as you might think. Give the VM all but 1 core, and give it all the free RAM on the system and then use that VM like your main driver. For the most part, Linux is not a resource pig like windows. It will run just fine with 4GB ram and 2 processors. Try Lubuntu instead of Ubuntu.
If you come across something that simply doesn't work for you on linux, just shutdown the VM and you can do it in windows.

When you feel comfortable enough, then you can do a backup of windows, wipe the system, and do a dual boot. Practice the dual boot in a VM environment first, make sure you can get it working right in circumstances where mistakes won't matter. When you are comfortable and ready, then you can do it on your main system or when you purchase that new computer of yours.

Point is, you get to learn about it in a save environment and you can experiment and break everything without any real consequences. Then you're comfortable, you can go break your real system trying to setup a dual boot because at that point, you will know how to fix it.

 

[EngWiPy]

But dual boot on a virtual machine means that I will run three OSs at once, right? Two virtual and one actual. I'm installing the VirtualBox and Ubuntu right now to see how it will perform.

 

[EngWiPy]

Strange! It tells me that "this kernel requires x86-64 CPU, but only detected i686 CPU. Unable to boot - please boot a kernel appropriate for your CPU". I have dual core i5 64-bit CPU. What's wrong here? I downloaded VirtualBox 5.1.10 for window host, and I downloaded Ubuntu 16.10. Something strange I noticed is that when I entered Linux Ubuntu as the name of the drive on the virtual machine, the option for version didn't change to Ubuntu automatically as it happens in the videos I followed. Also, there was only Ubuntu 32-bit from the drop down list!

 

[eys_physics]

Are you installing Ubuntu as a virtual machine in VirtualBox? As is said at http://askubuntu.com/questions/3089...box-due-to-this-kernel-requires-an-x86-64-cpu you need to choose Ubuntu-64 bit when you are creating the virtual machine.

 

[Stephen Tashi]

I've never used Virtual Box, but there is this from the web:

 

[EngWiPy]

Are you installing Ubuntu as a virtual machine in VirtualBox? As is said at http://askubuntu.com/questions/3089...box-due-to-this-kernel-requires-an-x86-64-cpu you need to choose Ubuntu-64 bit when you are creating the virtual machine.

I don't have Ubuntu 64-bit option in the virtual machine! Although I downloaded Ubuntu 64-bit version!

 

[EngWiPy]

I've never used Virtual Box, but there is this from the web:

It worked this way. Thanks

 

[EngWiPy]

I installed it. It's working just fine. It took approximately 1 hour to be installed (with the updates box checked). I allocated to it 2 processors and 4 GB RAM. I think it's not that bad, although it doesn't feel like a real thing with this VM because I can go to Window at anytime!

Anyway, now what can I do to get started as a Linux user? Do I need to know how to use the commands, for example? Or keep playing with the GUI first?

 

[john101]

try installing some linux alternative to something you need in windows

join http://www.linuxquestions.org/

edit add: also be aware you've installed Gubuntu (if the nomenclature was consistent.) ie ubuntu optimised for the Gnome desktop. Kubuntu is optimised for the KDE desktop and Xubuntu for the Xfce desktop. (Personally I prefer KDE over Gnome.) You can install other desktops in Ubuntu even though each variant is meant to be optimised for that particular desktop including a range of different utilities, filemanager, clipboard etc optimised for each desktop even though you can install a k utility in g etc.

 

[Stephen Tashi]

Anyway, now what can I do to get started as a Linux user? Do I need to know how to use the commands, for example? Or keep playing with the GUI first?

My first job after installing is to customize important things - like whether you want to the display to lock after so-many minutes , and whether you want to require a password to unlock it. I don't use Gnome, so I can't advise about exactly how to do this.

If you don't like the web browser you got by default, install a different one.

A simple Linux application to start with is LibreOffice - which will resemble MS Office. Maybe Ubuntu includes it already?

 

[EngWiPy]

Before I read the comments I installed Python 3.6 and its IDE PyCharm. I'm using this IDE on Windows. It's very similar to it.The difference in Linux is you need to use the Terminal to install these, which wasn't that difficult as long as the commands are available.

I'll try to do the things you suggested. Thanks

 

[EngWiPy]

OK, now I started working on Ubuntu and watching YouTube videos, the laptop becomes slow and the laptop's fan is keep running, which means that the hardware is being heavily used. That's why I was inclined for dual boot from the beginning; to allocate all the resources to one OS at a time. Now I have Ubuntu and Mint on VirtualBox, which one do you recommend if I go with dual boot? I want to use it for programming beside learning Linux. I feel that Mint is more user-friendly in terms of GUI, but I'm not sure about other features like stability.

 

[eys_physics]

It is mostly a matter of taste. In fact, Linux Mint is based on Ubuntu. So, the essential difference is the user interface. I believe it also differs a bit when it comes to which programs which are included in the installation. This is, however, a minor issue since you can install the software you want afterwards.
Regarding the stability, I had in the past some issues with Cinnamon (the standard gui in Mint). It was probably a bug which maybe has been fixed in later versions. I can thus recommend you to use the MATE version of Linux Mint. This is very stable and in my opinion faster (since the requirements on hardware is less). However, if Cinnamon worked in Virtualbox it will probably work if you install it as dualboot also.

 

[NTL2009]

But I cannot switch entirely to Linux now. I use many programs on Windows.

I have just one laptop at the moment. I'm thinking to buy a new one. In that case I will allocate one for each OS.

Yes, I would like to learn Linux, and use it for different things like coding for example. In the future, if I like it and have no compatibility issues with other users, I might switch to it entirely!

By the way, what's about compatibility with windows? Like say I write a document or presentation on Linux, would I be able to run it on windows OS?

While there are many paths you could take, based on the above, I think you will get the most with a separate machine for Linux. My reasoning:

A) While installing Linux to dual-boot Windows on one machine isn't all that difficult or risky, it can be a little intimidating the first time out, and you do run the small risk of booting issues or even messing up your Windows install. You'd probably be fine, but those risks are real. Once you've done an install or two, it will be easier to tackle if you decide for that path in the future.

B) Installing on a machine where you can just wipe the hard drive is really simple. It will be a big confidence booster, and eliminate some variables. And since you want to learn Linux, having a machine dedicated will help you. You will hesitate to reboot to go back-forth, and oyu can have your Windows machine open to search any troubleshooting you might need to do, with your Linux open.

C) And especially since this is about learning for you, I'd highly second the recommendations to create a separate "/" partition for the Linux system and the "/home" partition (your personal files, documents, music, videos and some settings reside here). My "/" partition is 25GB, you might want to go a little larger, but I've also added a LOT of stuff and I still have room. And I would create multiple "/" sized partitions, depending on your drive space. The advantage is, you can install several varieties of Linux, and all these can access the "/home" partition with your documents. So you can reboot between different installs to try them out, reload things while keeping one constant as a reference point, or boot into another to troubleshoot the others.

BTW, I've been using the "Xubuntu" variant, and have stuck with 14.04. It is 'lighter' than the graphics heavy "Unity" based Ubuntu, and I like it better - very easy to customize through the GUI to get the desktop set up to work efficiently for me.

If you need any help with the install, there are other good forums, but I'm sure people here will help as well, if it is considered in line with the objective of this forum.

As an aside, my wife's MacBook Pro is aging, and she uses it 1/2 the time for watching DVDs, then facebook, browsing, a little email. The new Apple portables don't include a DVD drive - I may just set her up with Linux when the MacBook dies - I think she'd be fine with it, and one less system type for me to maintain (I've gone nuts with some of Apple's 'updates' that take things backwards).

 

[newjerseyrunner]

It's always better to visualize in my opinion. There should not be any performance hit, I use virtualization on my live servers. Virtualization allows things like versioning the entire computer, copying it, pausing them...

 

[EngWiPy]

I'm still using VirtualBox, but I needed to resize the hard drive because at first I allocated only 10 GB for Ubuntu, and they were occupied very quickly.

What's the difference between dual boot and having only Ubuntu on a machine? and if I installed only Ubuntu on a machine, will I be able to install Windows on it later, since the recovery part is on the hard drive not on an external disc?

 

[NTL2009]

...

What's the difference between dual boot and having only Ubuntu on a machine? and if I installed only Ubuntu on a machine, will I be able to install Windows on it later, since the recovery part is on the hard drive not on an external disc?

Just that when you install Ubuntu alone, you won't have to take into consideration the Windows install at all. Not really a big deal, just one less worry if you are new to this.

On one of my machines, I wanted to partition so as to only leave a little space for Windows, as I didn't plan to use it much, if at all. But there was something funky going on, Windows seemed to have something allocated at the mid point of the drive space, and it would not let me use that free space for a new partition. I found people mentioning some 'tricks' to free it up, but that sounded risky. But afterwards, I had no problem putting a folder in that space, and Ubuntu could use it for storage.

I'm not much of a Windows guy, but I'd guess you'd likely need to wipe the drive and install Windows from scratch if you wanted. I don't think a Windows install would protect the Ubuntu install, it would likely walk right over it.

 

[EngWiPy]

I heard that defragmentation solves the hidden files problem, doesn't it?

 

[NTL2009]

I heard that defragmentation solves the hidden files problem, doesn't it?

I don't recall that being a solution, but maybe that works in some other cases? Lots of variables I suppose.

 

[Routaran]

I'm still using VirtualBox, but I needed to resize the hard drive because at first I allocated only 10 GB for Ubuntu, and they were occupied very quickly.

What's the difference between dual boot and having only Ubuntu on a machine? and if I installed only Ubuntu on a machine, will I be able to install Windows on it later, since the recovery part is on the hard drive not on an external disc?

I haven't purchased a brand name computer for a very long time so I am not sure exactly how the windows bootloader is configured for the recovery partition or how to recover/repair the bootloader to allow you to access the recovery partition. Maybe someone else here does.

When you install Ubuntu on a system, it will modify the MBR and use GRUB to load the system instead of the Windows Bootloader. GRUB let's you pick if you want to load Windows or if you want to load Linux when you boot
The problem with installing windows AFTER ubuntu is that the windows bootloader gets installed 2nd and it removes the GRUB pointers from the MBR so you cannot load linux anymore. By default, Windows only let's you load windows and nothing else. You can still repair it but it can be complicated for someone not familiar with GRUB.

What I suggest for dual boot configurations is this, first install windows on the computer and leave space for linux. Then after the windows installation is complete, then install linux because GRUB let's you choose if you want to load Linux or Windows when you boot.

Performance wise, there's no difference between using a dualboot and a pure ubuntu system.

 

[john101]

there are some other options to consider. eg make a botable thumbdrive.. install a second drive.. clone your drive before wiping so you can replace as is if problems arise..

___

If you have a windows recovery partition that installs or reinstalls windows you might not want to wipe your drive.

You can use a program like gparted. Boot into it and using a prepared partitioning plan, leave the windows reinstall partition alone. Divide the rest of the space into a section (at the beginning) that you can use to reinstall windows, format that section ntsf. Install windows there. Windows installs its boat loader.

and a section that you can use to install linux. divide that section into a couple of sections to install different linux on.

When installing linux you get option of which partition to install linux on.

When installed, linux installs a boot loader http://www.thefreecountry.com/utilities/multi-boot-managers.shtml that recognises the windows installation and gives you a choice to go there.

If you install windows after installing linux, windows won't recognise the linux installation and installs its own boot loader with no linux option.

There are ways around all that too.

You have to be prepared to learn stuff and make mistakes. Remember you're not the first to do all this so not the first to make the mistakes and look for solutions. They're out there.

Possibly the most important thing is not to wipe the windows installation partition on the laptop.

edit add: just noticed Routaran dealt with most of that in his post.

 

[EngWiPy]

Yes, I'm inclined for the dual boot option, but I think for now I will use virtualbox until I feel I need to format my laptop, then I will install Ubuntu so that if doesn't work, I will be recovering the Windows anyway. If it works, then I can do it again after recovering the Windows.

 

[Routaran]

Yes, I'm inclined for the dual boot option, but I think for now I will use virtualbox until I feel I need to format my laptop, then I will install Ubuntu so that if doesn't work, I will be recovering the Windows anyway. If it works, then I can do it again after recovering the Windows.

Good! I believe this is the safest course of action. Get familiar first, then go crazy!