The layer between your hardware and software. It manages disk input/output, memory allocation, graphic acceleration, hosting device drivers and various other resources.

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1answer
112 views

Can Ubuntu or Windows run OS X?

Can Ubuntu run Mac OS X? I currently run Windows 7 – can I download and run one of the OS X programs?
10
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2answers
1k views

How to stop and detect the fork bomb

#include <stdlib.h> #include <unistd.h> int main() { while(1) fork(); } This is the code for a fork bomb. In our college, we connect via telnet i.e client serving protocol. ...
3
votes
2answers
1k views

How to improve ram and hard drive performance

I'm not able to figure out what the actual problem with my system is. It takes 15-20 min to start up completely and when I checked the start up programs there was no big program listed. When I open ...
0
votes
1answer
4k views

Redirecting or routing all traffic to OpenVPN on a Mac OS X client

I have configured an OpenVPN (2.2.1) server on an Ubuntu virtual machine in the Amazon elastic compute cloud. The server is up and running. I have installed OpenVPN (2.2.1) on a Mac OS X (10.8.2) ...
1
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2answers
905 views

I want to run an rsync command at midnight but make it stop at 8am. How can i schedule the start AND END of a command?

I want to run an rsync command at midnight but make it stop at 8am. How can i schedule the start AND END of a command? I've looked into cronjobs but that will only start at a certain time. Any ideas ...
1
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2answers
430 views

Is there any minimal operating system to run virtual machines?

I would like to use a OS X in a virtual machine, the problem is running the VM in Windows or Ubuntu because the host OS takes a lot of CPU. Is there any very minimal operating system that can ...
-3
votes
1answer
80 views

USB Driver for Windows [closed]

I want to make a usb driver in c for windows. I have good background in c and c++. Can anybody suggest me how should i start my development?any suggestion?
0
votes
1answer
91 views

Modifying the linux scheduler

I want to change specific parameters of the linux CFS scheduler like the virtual runtime of particular processes dynamically ( vruntime parameter in the sched_entity ). Is there any definite method to ...
1
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2answers
424 views

Image is too big for DVD, even though the image is small enough?

I am trying to burn an ISO image to a DVD. The DVD is supposed to store 4.7 GB, but when I try to burn the image to it, Windows says the DVD is too small. The image is 4.51 GB big, and uses 4.51 GB ...
0
votes
1answer
75 views

Files are now readonly

I am using windows 7. All my folders became read-only suddenly and I cannot edit any type of file on my computer. Yesterday it was fine, but suddenly I discovered this when I am trying to edit some ...
1
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3answers
31 views

Change operating system on boot up

I'm trying to figure out how to get the menu to change your operating system on computer start up. I Have windows 7 & I'm trying to install Ubuntu.
1
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1answer
228 views

What is Root Buffer Overflow?

I understand what buffer overflow is. As the literature says, "A buffer overflow occurs when a fixed-length buffer reaches its capacity and a process attempts to store data above and beyond that ...
1
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0answers
137 views

Using Bootcamp with Windows Recovery Disks?

My friend is a regrettable Mac owner and wants to play some Windows-only games. I recently built a new computer with 7 and kept the CD Key from my old Vista 32-bit installation. He has a 1-2 year old ...
1
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5answers
4k views

How do I exclude specific directories from a Windows search?

I want to search for a file on drive C:. I know for sure it does not exist in a specific directory(s) (say Program Files). So to shorten my search time, I want Windows to exclude searching in those ...
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votes
0answers
13 views

Dual OS configuration [duplicate]

I have installed windows and Linux(ubuntu) on the same machine. Now the problem is when I start my machine, It directly goes to Linux and not asking me for the selection of OS either I want to load ...
1
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1answer
99 views

System restarts automatically

I have installed both Ubuntu 11.10 and Windows 7. My system was working fine when suddenly I got the blue screen of death (bsod) while logging into windows 7. It said about the ACPI compliant and when ...
1
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2answers
325 views

ls executes slowly on remote server

I have a very strange problem, one that may be too difficult to diagnosis without machine access, but maybe someone here may be able to help. I am using OS X, and on my local machine ls executes ...
2
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2answers
529 views

Merge two 1GBps NIC's on a single PC

Is it possible to merge two 1GBps NIC's on a single PC thereby doubling the available LAN bandwidth? Two other PC's would then be able to request data at 1GBps each instead of splitting the 1GBps NIC ...
-1
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1answer
202 views

HTC ONE X Custom ROM Issue [closed]

I tried to install a custom ROM on my htc one X without making any backup. My new custom ROM did not installed correctly. It is just showing X type logo of custom ROM after htc splash screen. I can go ...
0
votes
0answers
48 views

Create Windows XP restore partition

I have a computer without CD Drive and use to install windows XP regularly as I am using for my cyber cafe. To make it easily install my window XP I would like to create a restore partition in my ...
0
votes
2answers
59 views

Keeping bootable images of all my operating systems and run them over LAN

I love being able to run what ever, whenever. Is is possible to store images of all my operating systems on a server, and run them over a LAN whenever I need to, on what ever computer I log in from? ...
1
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1answer
44 views

what does giving control to an application mean?

I'm reading Operating System Concepts by A. Silberschatz et al. I'm trying to understand what is Dual-mode operation of an operating system. It states in page 22 that: Initial control resides in ...
4
votes
2answers
193 views

One USB flash drive to rule them all

Yesterday I purchased a 32GB USB flash drive. I have a myrid of systems in my home, and would like to have one flash drive with setup files for all the various systems throughout the house. I kept ...
3
votes
3answers
6k views

Memory limits in 16, 32 and 64 bit systems

The theoretical memory limits in 16, 32 and 64 bit machines are as follows: 16 bit = 65, 536 bytes (64 Kilobytes) 32 bit = 4, 294, 967, 295 bytes (4 Gigabytes) 64 bit = 18, 446, 744, 073, 709, 551, ...
2
votes
1answer
96 views

Would installing Windows 8 be better than System Reset

I'm trying to fix a fairly new windows 8 system, it has crashed from what seemed a windows system corruption. I tried doing a system reset, it worked fine then i gave it back to the owner. Again it is ...
0
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1answer
120 views

Linux OS for Mac PowerBook g3 (1998)

So I got a PowerBook G3 off EBay (I don't know why, I just did) and it arrived. Now that I have it i realised that is nearly useless running Mac OS 9. My question is : Is there a Linux distro, like ...
3
votes
1answer
8k views

how to fix empty turn windows features on or off

I am running win 7 home premium, and now I see my windows and features list is always empty, i tried many solutions but nothing did it. I tried this last thing but failed to solve as well
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0answers
233 views

Unable to boot Centos 6.3 from live CD

This seems a strange question to ask. The the same cd boots perfectly on one PC but gives the message- slab error in kmem_cache_destroy():cache 'Acpi-Operate':can't free all objects slab error in ...
1
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1answer
62 views

Is it better to store the OS, data files or program file on a SSD? [closed]

If a system has one 120GB SSD what is the most efficient use of it? I heard since most programs make calls to the operating system it increase the performance of everything if you install the OS on ...
4
votes
3answers
394 views

Difference between programs compiled for different OS

On a compiled code standpoint what is the difference between a program compiled for one os vs another (Linux vs windows for instance). Doesn't the program run directly on the cpu? Or is it because the ...
0
votes
1answer
61 views

Seek performance characteristics for RAID design

I am trying to come up with an optimum RAID read policy. I've noticed that with a 64K RAID chunk size on a recent 1.5TB drive, where a given data is read in 64K chunks in a round-robin fashion from 3 ...
0
votes
2answers
660 views

Is there any disadvantage to running a 64 bit OS on a low memory system? [duplicate]

Possible Duplicate: advantage of 64 bit os on system with only 2Gb Is there any disadvantages in running a 64 bit OS on a low memory system, say 2GB of RAM or less? Would there be any ...
1
vote
1answer
218 views

Install Windows 8 from USB but keep Windows 7 and Ubuntu

I wish to install Windows 8 on my laptop. Currently, I have Windows 7 and Ubuntu 12.10 (Quantal Quetzal) available when I boot my computer up. Is there a way for me to install Windows 8 using a USB ...
1
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3answers
293 views

would a core failure on a multicore computer cause system instability?

Say for example, one of the cores in a quad core computer overheated and died, would the system compensate by routing all operations to the remaining 3 cores, or would the computer be inoperable? If ...
1
vote
1answer
73 views

PC system repeats for 15 times keyboard's key strikes in random moments

I have a PC system with a really strange issue, I think it's hardware. While typing, at random moments and usually after repetitive strikes of any key, or fast typewriting, it repeats the last ...
1
vote
2answers
676 views

Wiped a hard drive and now I can't install an OS X on it?

I had 4 hard drives that I put in to my new computer and wiped them individually using the cipher command in Windows 7 and then formatting in the windows explorer. They all worked prior and I could ...
5
votes
4answers
2k views

How do multi-core CPUs work?

I know, vague question title, but my main question is, does 1 core have to execute only one program at a time? Does the "multitasking" at the CPU level work by switching between tasks, and if so, why? ...
0
votes
1answer
39 views

Move focus to next window on Windows 7

On OS X you can move focus (also called cycle through windows) to the next window for the same application. If I have 5 windows open in Finder, I can cycle through them with CMD+shortcut. Only the ...
1
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4answers
197 views

Create Live Ubuntu or Windows System on USB

I would like to install Ubuntu to a USB Flash Drive so that when I boot my computer I can boot into the Flash Drive which will have UBUNTU Installed. The objective here is to put some tools on the ...
0
votes
2answers
2k views

How can I make my computer ask me which OS I want to load while booting?

I have 2 hard disk, one with one partition with OS, and the other with 2 partitions, one with OS and the other one whithout. I want to be able to decide which OS I want to load each time I boot the ...
2
votes
2answers
71 views

Library functions are always implemented using system calls?

We know that system calls are requests by a process for a service from an operating system's kernel.[1] I'm asking this question because I wanted to know if a process can really generate a signal on ...
0
votes
1answer
1k views

Aspire V5-531 Operating System Not Found

I recently purchased an Acer Aspire V5-531. I replaced the 320GB HDD with a 120GB Kingston SSDNow V200 and installed Linux booting with rEFInd. Due to a necessary change, I have to move back to ...
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2answers
222 views

Does the OS exploit multiple cores

I know that more cores isn't always better and that most applications are single threaded however does the OS make use of the additional cores? For example, assume an application such as a dictionary ...
2
votes
2answers
233 views

What is the need for BIOS ROM to be present on the address space on PC?

When an x86 PC boots, it starts executing a program called the BIOS, which is stored in non-volatile memory on the motherboard. The BIOS’s job is to prepare the hardware and then transfer control to ...
0
votes
1answer
87 views

Install high-end applications one layer above the OS

I'd like to install high-end applications such as databases, servers and IDE tools one layer above the OS. Virtual machines come to mind, but my host OS runs just fine and I don't want to waste the ...
0
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1answer
119 views

Operating System Development [closed]

I intend on creating a very basic operating system that does the basic stuff related to the operating system but don't want to work on low level program so was wondering if there was the possibility ...
2
votes
2answers
73 views

Program in place of the OS

How can I run a program in place of an OS ? I mean is it possible for me to replace the OS with a custom made program which says "Hello World" as soon as the Hardware starts ?
1
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2answers
4k views

Sony Vaio BIOS Setup not Working?

I have a Sony Vaio E-series (VPCEA22EA) laptop. Yesterday, while I was starting up my laptop as usual, it showed the password error saying: Password you entered is incorrect I forcefully shut it ...
1
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1answer
11k views

grub rescue prompt after reinstall windows on dual boot

I was dual booting windows and Ubuntu. When I reinstalled windows, it would no longer get to the grub menu. Its showing: error: no such partition. grub rescue> I want to fix this without using ...
5
votes
2answers
684 views

What is the difference between Ubuntu, Xubuntu, and Lubuntu

I am relatively new to Linux operating systems and I'm trying to find out more about them. Unfortunately, I cant find a whole lot of good sources about them. Right now I get a bit confused and mixed ...