For questions regarding the installation of two or more operating systems on a single computer.

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347
votes
10answers
1.1m views

Installing Ubuntu on a Pre-Installed Windows with UEFI

I'm absolutely new to Linux. I have been using Windows for all my life, but I have read about Ubuntu (and Linux in general) and I think I'll like it, so I wanted to know how to install Ubuntu on my PC ...
149
votes
9answers
211k views

How can I repair grub? (How to get Ubuntu back after installing Windows?)

I installed Windows 7, which ate Ubuntu's boot file. When starting up the computer, it now goes straight to Windows, without giving me the option of booting Ubuntu. How can I get Ubuntu back?
84
votes
3answers
241k views

How do I set the grub timeout and the grub default boot entry?

In Ubuntu 12.04 (or above), how do I set the GRUB time and the default OS (that I see at boot time) as I'm dual-booting Windows (7/8) and Ubuntu (12.04 or above)?
82
votes
14answers
219k views

How can I install Windows after I've installed Ubuntu?

I have Ubuntu on my laptop. Now I want install Windows 7 in a dual-boot. How can I do this? I can't lose my Ubuntu files, and I'm afraid that I might break GRUB.
73
votes
4answers
46k views

Clock time is off on dual boot

Dual boot system Windows XP Pro and Ubuntu 12.04. I have the bios set for the correct time and Ubuntu set for US Eastern time. Ubuntu will boot up and the time will be off by -4 hours. If I correct ...
52
votes
8answers
67k views

How to automount NTFS partitions ?

I have two NTFS partitions, and I don't want to mount them everytime I start Ubuntu. How can I do this ? Is there a tool or a code to use? If so, is it safe to automount? specially when they are ...
46
votes
1answer
65k views

Dual boot Surface Pro with Ubuntu?

How could I setup a dual boot for Ubuntu and Windows 8 on my Microsoft Surface Pro with 128 GB. Note: My dual boot solution is below.
37
votes
1answer
25k views

How can I dual boot Windows and Ubuntu?

I currently have Windows 7 on my computer and I want to install Ubuntu alongside Windows safely. Could someone please provide clear instructions?
29
votes
3answers
7k views

Is Ubuntu destroying my internal HDD?

I have an Inspiron 3521 that came pre-installed with Windows 8.1. I decided to dual-boot Windows and Ubuntu, and it was working good. But, when using Ubuntu, I heard a lot of noise from my laptop ...
29
votes
5answers
29k views

Automatically mount NTFS drive when I login

I use Ubuntu 11.10 and Windows7 dual boot with Ubuntu as my primary OS. Every time I need to access a document I need to mount the respective drive, though this is not at all tiresome, still, is ...
28
votes
2answers
30k views

How to get grub2 to remember last choice?

Grub2 - Community Ubuntu Documentation says the following: Saving an OS can be achieved by running sudo grub-set-default if DEFAULT=saved is set in /etc/default/grub. It may also be saved if ...
28
votes
4answers
131k views

Grub rescue - error: unknown filesystem

I have a multiboot system set up. The system has three drives. Multiboot is configured with Windows XP, Windows 7, and Ubuntu - all on the first drive. I had a lot of unpartitioned space left on the ...
23
votes
3answers
65k views

My main username is not in the sudoers file

I was trying to install some software/edit files with my main username(not root) But I got this error [X] is not in the sudoers file. This incident will be reported. I tried to edit the /etc/sudoers ...
22
votes
6answers
48k views

Windows 8 removes Grub as default boot manager

I have a Sony VAIO S series with Windows 8 preinstalled, and I installed Ubuntu 12.10 on a new partition. When the PC boots Grub is display, and I can choose between Windows 8 (didn't worked at the ...
21
votes
6answers
27k views

A common /home partition for multiple Linux distributions

I have an Ubuntu installed in one partition, Debian on the other and now I am planning to install backtrack and SUSE also. Debian mounts a separate partition as its home mount point, whereas Ubuntu ...
20
votes
7answers
28k views

Should I choose exFat or NTFS for a “shared” partition in a dual-boot system?

I have a new laptop which I am setting up as dual boot Windows/Linux. I would like to access files from both Ubuntu and Windows 7. Should I create a separate NTFS partition?
20
votes
7answers
70k views

Grub does not show a Windows 8 option after dual boot

So, I've successfully dual-booted my Windows 8 machine with Ubuntu 12.04 . However, I still don't have a convenient method of choosing what OS to load at boot time. After installing Ubuntu, my ...
19
votes
9answers
3k views

Install Ubuntu without making Windows license void

I have a dell laptop with a pre-installed version of Windows 7 home premium. I want to dual boot my system to run both Ubuntu and Windows 7. The engineer told me I cannot do this without removing ...
19
votes
6answers
139k views

How to install Windows 7 after Ubuntu and dual boot? [duplicate]

I just installed Ubuntu, a full install removing the prior OS. I was forced to remove Windows 7 from my HP dv6 because of the max four partitions already being there. I didn't lose anything, all ...
18
votes
6answers
15k views

How to reboot into Windows from Ubuntu?

I'm looking for a way to reboot into Windows from Ubuntu on a 10.10/Vista dual boot system. The specific use case is that I would like to be able to ssh into my running Ubuntu instance and issue a ...
18
votes
11answers
66k views

How do I hide the GRUB menu showing up in the beginning of boot?

I stopped Dualbooting and I dont want to have to choose the OS anymore and just have it load Ubuntu like normal like before? Any help is appreciated.
18
votes
4answers
96k views

How to set Windows bootloader as default bootloader?

I have a Win 7/11.10 dual boot system with Grub 2 as the default bootloader. However, I want to make Windows bootloader the default bootloader (grub 'dos' like interface scrares the hell out of my ...
18
votes
8answers
43k views

Hide GRUB2 menu UNLESS you hold down Shift key: how to make this happen?

I have a Ubuntu - Windows 7 dual-boot set-up, and I would like to have it that my laptop would boot up Windows 7 unless I press down the Shift key right after boot and bring up the Grub2 menu from ...
18
votes
3answers
3k views

How do I burn multiple Ubuntu isos on one DVD?

I always find it a waste putting a 790MB Ubuntu iso on a 4GB DVD, and I was wondering how to put multiple operating systems on one DVD with a grub menu. I know it is possible, but I just don't know ...
17
votes
6answers
9k views

To use Windows and Ubuntu on one computer, which should I install first?

I understand it's possible to install Ubuntu first, and later Windows or to install Windows first, and then Ubuntu, but assuming I have the freedom to do either, which is the better, easier, and more ...
17
votes
7answers
27k views

How do I scan my windows partition for viruses from Ubuntu?

I think I might have a virus on my windows partition and I want to scan it from Ubuntu. Is this possible? I would like a program that is free. clamAV I tried clamAV but I couldn't find a setting ...
16
votes
5answers
7k views

Why can't I install Ubuntu or Wubi on a Windows Dynamic Disk?

I've been trying to install 12.04 for a while now, I'm running on Windows 7 and I already made the partition (it's dynamic). I've tried booting from a disc and also the Windows installer. I haven't ...
16
votes
1answer
2k views

boot up problem (14.04 + GRUB + Swap + Nvidia) - with pictures

When I start my laptop, it takes as much as 7 tries to get past the place where the swap gets mounted; if anyone is looking over my shoulder then it becomes 15 tries! My laptop is a lenovo W520 with ...
15
votes
3answers
12k views

Is a /boot partition necessary anymore?

A fair while ago (~ 2004) I was told to always create a separate partition for the boot directory. And since then I always have. But after reading a few questions about partitioning questions, I'm ...
15
votes
4answers
913 views

Is there a better option other than NTFS for a shared HD between Ubuntu and Windows 7?

I have a PC with dual-boot, and I have installed Xubuntu (always newest version) and Windows 7. I have a new HD and I would like to be able to access it from both OS. I suppose NTFS would work since ...
14
votes
5answers
11k views

Windows 10 upgrade lead into grub rescue

I was dual-booting Windows 7 and Linux Ubuntu on my desktop, and today is the day they gave out free Windows 10 upgrades. How exciting! I got the update, and it was installing, and I left to go take ...
13
votes
6answers
35k views

How to change the time for OS selection menu in GRUB?

I have Windows 7 and Ubuntu 12.04 in my system and i saw that the default time for os selection menu is only 10 sec, as i am new to Linux can anyone tell me how to increase this time?
13
votes
3answers
9k views

Why does time change in Ubuntu after installing Windows [duplicate]

Today I was installing Windows 7 on the same computer I have Ubuntu. For some reason, after installing Windows 7 and going back to Ubuntu the time went from the correct hour at that moment, 12:30PM to ...
13
votes
2answers
1k views

One click shutdown Ubuntu and load into alternative bootup

I have a dual boot system with Ubuntu 11.04 and Windows 7. My GRUB bootloader defaults to Ubuntu. I mainly use Ubuntu, but I occasionally need to bootup Windows to do a few things. If I need to do ...
13
votes
2answers
21k views

If Windows 10 “upgrade” affects GRUB2 and screws up my dual boot with Ubuntu will I have to completely wipe my computer and start from scratch? [closed]

I turned off Windows update because I read about problems with BIOS tinkering within the updates. Partitioning is not something I do on a daily basis so fear has been creeping up on me with updates to ...
13
votes
1answer
52k views

Where to install bootloader when installing Ubuntu as secondary OS?

I'm trying to install Ubuntu as secondary OS on my laptop. I have Windows 8 already installed on my laptop. Now, I know how to run Ubuntu from USB drive, I created addition partition and formatted it ...
12
votes
7answers
30k views

Will upgrading Windows 8 to 8.1 affect Ubuntu?

It's a rather simple question (I hope). I currently have Windows 8 and I am dual booting it with Ubuntu 13.04. If I were to install the latest update for Windows 8, that being 8.1, will it affect ...
12
votes
7answers
4k views

How can I tell if I installed with wubi?

It sounds odd, but I really can not remember how I installed my ubuntu. What I am sure is, I had Windows 7 installed on the laptop in the very beginning, then I installed ubuntu so that this is a ...
12
votes
4answers
32k views

Deciding between virtual machine or dual-boot setup

I would like to set-up a PC to run ubuntu most of the time, but also need to run XP for specific applications and testing. In the past I would have simply set up a dual boot machine and then restart ...
12
votes
11answers
8k views

Windows 10 upgrade kills grub and boot-repair doesn't help

I've just upgraded to Windows 10 from Windows 8.1 on my partitioned laptop that has Ubuntu 14.04 installed. Grub no longer appeared on boot so I ran boot-repair from an Ubuntu liveUSB. This didn't ...
12
votes
2answers
36k views

How do I install Windows 7 alongside a pre-existing Ubuntu installation?

I purchased a PC six months ago for work related tasks. I do 95% of my work on Ubuntu (web development). Now, I want to install Windows on another partition to play a few games on my relax time. Which ...
11
votes
6answers
30k views

Upgrading from 13.10 to 14.04 broke Grub

I have a dual boot Ubuntu + Windows 8 on an UEFI system. Everything was ok until I upgraded to Ubuntu 14.04 from 13.10. Now what I get when I boot the pc is a grub rescue screen like this with the ...
10
votes
8answers
77k views

How do I remove my Ubuntu partition from Windows 7 and reuse the space?

I am dual-booting Windows 7 and Ubuntu, both installed on separate partitions. I don't need Ubuntu anymore. How can I remove the Ubuntu partition(s) and add the reclaimed space to my Windows 7 ...
10
votes
3answers
2k views

How to efficiently partition a single Windows-Ubuntu dual boot disk?

This is not a question on how to install Ubuntu or how to use manual partitioning during installation but is a question on access rights and how not to let them bite you in the lower abdomen... ;-) ...
10
votes
2answers
14k views

How do I triple-boot Ubuntu, Fedora and Windows 7?

I have an Acer Laptop with windows 7 pre installed. I want to install Ubuntu and fedora and make a triple boot configuration. I want to know how? I am a newcomer to linux and I need help.
10
votes
2answers
5k views

What is the .Trash Folder on the NTFS partitions?

When using a dual-boot Windows and Ubuntu. I see that there is a folder created with the name .Trash-1000 in the NTFS partitions. Could someone explain to me : What does this folder mean ? For ...
10
votes
3answers
83k views

Grub not showing on startup for Windows 8.1 Ubuntu 13.10 Dual boot

Ok, so I'm such a newbie to Ubuntu and I bought a Windows 8 pre-installed laptop last month. I updated to Windows 8.1 and then I thought about installing Ubuntu as a dual boot so I could mess around ...
10
votes
8answers
26k views

Dual boot Windows 7 and Ubuntu, SSD + HDD

I am new to linux and Ubuntu and wish to create a system that can boot both Windows 7 (for windows specific applications) and Ubuntu (I wish to become familiar with linux and Ubuntu for work). I have ...
10
votes
3answers
53k views

Dual boot windows 8 and Ubuntu with Windows 8 Boot manager

I have two partitions on my hard-didk , I have installed ubuntu on my 1st partition and windows 8 later on another partition.Now i can only boot into windows 8 because it doesn't recognize Ubuntu. ...
10
votes
1answer
4k views

Cannot detect Windows 8 from Ubuntu 12.04 Live USB installation on Toshiba qosmio x870

From other questions raised, I read that if Ubuntu Live USB boots in UEFI mode then it should detect Windows 8 during installation. During installation, I only see two options, Erase disk and install ...