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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65 views

Linux distribution detection with Nmap

When I run Nmap with OS detection it delivers the kernel version of the Linux host instead of the name of the Distribution. Nessus does Os detection based on banners ...
2
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1answer
59 views

How is system call executed [closed]

From the point of view of application programmer the system call is just invocation of a procedure from wrapper library. As I don't have good knowledge of assembly I was wondering how it is done on ...
0
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1answer
73 views

Why cant you install operating system onto RAM [duplicate]

Why cant you install an operating system onto RAM ?? I know RAM is temporary memory and this memory will be lost when the power is switched off so cant the computer like save the state of the ...
1
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1answer
43 views

One machine on network wont load our website

There is one machine on my network that can not access one of our websites! Chrome just idles for a while then says "Oops can't connect", similar behavior is observed in other browsers too. Nslookup ...
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1answer
2k views

Delete all login.keychain files

Does anyone know a way to script the deletion all login.keychain files from all user directories on Mac OS X? This is a lab environment bound to AD, and when a user changes their password, without ...
3
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1answer
125 views

Spec for spec speed differences between specific and generic hardware setups

John Carmack tweeted: For the same given paper spec, a console will deliver twice the perf of a PC, and a PC will deliver twice the perf of a mobile part. Normally this is the sort of claim I ...
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0answers
24 views

Compiling OS from source

I downloaded the Python OS source code (the compiled ISO torrent didn't work) and I got a bunch of folders with makefiles and things in them. I'm trying to figure out a way to run this preferably on a ...
1
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1answer
40 views

what OS to use when it comes to iTunes usage on virtual machines?

I'm interested in building a machine to VM iTunes to data wipe iPhones as part of recycling process. Now I was wondering which OS (mac/windows) would have iTunes run as it best performance wise? Also ...
3
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2answers
60 views

Load an remote Operating System to the local machine to work like local operating system

Could anyone of you suggest some method(idea) for loading an OS from a remote server to the local machine hard disk. Please see the scenario here, for more clarification. Imagine one guy has his own ...
0
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1answer
84 views

What's the best way to set up a fresh OS install?

My computer is deathly slow so I'm reinstalling Windows 7. However, I'd like to know the best way to set up the file system. Previously, I just installed it and used it. I was told by a friend that I ...
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4answers
28k views

An operating system wasn't found

When I boot my computer, it boots fine. When I restart it though, I get the following error: An operating system wasn't found. Try disconnecting any drives that don't contain an operating system. ...
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2answers
130 views

What *exactly* happens when I insert my USB into a computer? [closed]

What exactly happens when I insert my USB into a computer?
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3answers
2k views

Is having more CPU cores a better thing for running a web server?

I was reading about how User threads are mapped to kernel threads on Wikipedia. From this article I understand that FreeBSD uses the 1:1 (Kernel-level threading). So each User thread created by the ...
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2answers
90 views

Why can't computer detect the lack of floppy drive?

I have a question that I had been wondering about ever since my first OS freeze due to an attempt to read a floppy from a drive that doesn't exist. Why do operating systems even try that? Isn't it ...
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5answers
85 views

Am I using the Linux or Ubuntu platform?

I am not sure if this question goes here, but I was wondering about the relationship between Linux and Ubuntu. I read on-line that Ubuntu is a "flavor" or "variation" of ...
0
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2answers
81 views

Tool to remove windows system, and other program files from old backups

I had a habit of copying everything when I backup my old computers in the past, system files and all. The whole volume. I recently purchased a new hard drive (my 4th 500 GB drive). Now all 4 of them ...
4
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0answers
144 views

Firefox OS (html5,js) vs Android (java) vs IOS (objective-c) In terms of pl and tech use, how can the other is faster? [closed]

How can be one faster than the others, what happens inside their code, is it a matter of the engine they are using? (noob about the gecko, linux kernel thing, educate me) One of the limitations of ...
2
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2answers
92 views

Which physical core does the operating system use? [closed]

The operating system needs to be running on one or more physical cores of a multi-core processor, right? Is it possible to identify which those physical cores are using a piece of code?
2
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1answer
675 views

Install Mac OS on Macbook Air running only Windows 7

My girlfriends Late 2010 Macbook Air, only has Windows 7 installed on it. I am now taking it over and want to get rid of Windows and only have Mac OS. Problem is all the stuff I can find online, ...
3
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4answers
105 views

Is Direct X available for Operating Systems other than Windows?

Is Direct X a software exclusively for Windows? If so which software does the work of Direct X in other OS?
0
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1answer
71 views

What is the impact of killing a process on the operating system (Windows and Linux)?

What is the impact of killing a process on the operating system (Windows and Linux)? I have a script that forks some executables and monitors their progress and kill those that exceed certain runtime ...
0
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1answer
333 views

Enable to install Linux Ultimate Edition (Ubuntu)

After I deleted Linux partition from Windows 7, I wanted to install a new version Linux Ultimate Edition 3.8 which is based on Ubuntu 13.04 Raring Ringtail. So I made a bootable usb, but when I boot ...
4
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1answer
165 views

How does windows 8 prevent BIOS access

I am trying to get a better understanding of how BIOS and operating systems work. From what I understand, BIOS is a basic piece of software that is the first thing to be run when a computer turns on ...
1
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4answers
150 views

Can a 32-bit system be upgraded to a 64-bit?

The question is fairly self explanatory. I have a 5-year-old computer running 32-bit Windows XP. I have an install disk for 64-bit Windows 7. Can I upgrade my operating system despite the bit ...
0
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1answer
2k views

SSH Issue on AIX 6.1

I recently upgraded the openssl version on AIXX 6.1 server. The install went fine. But now I'm unable to start new ssh sessions from puty to the server and I'm getting the error "Connection ...
3
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1answer
4k views

Who loads the BIOS in RAM during computer bootstrap

When the computer starts up, the code in BIOS is executed first. However, how is the code in BIOS loaded into the RAM for execution ? I have referred to this question - Is BIOS read from the BIOS ...
0
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1answer
82 views

Bootable hard drive to install Windows XP?

What to write onto hard drive, so that it will be bootable and it will be possible to install operating system (like Windwos XP) from it onto itself? I have old notebook with broken CD-ROM and which ...
2
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1answer
77 views

Uninstall Invisible OS (Windows 8 Preview) - Appears in boot

I've been using Windows 7 for three years now with no other operating systems. When the Windows 8 consumer preview came out last year, I partitioned my hard drive to dual-boot Windows 7 and 8. When ...
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2answers
137 views

Why is not feasible to uninstall an operating system the same way it is installed?

I, as someone that work with IT stuff, am asked every other time to re-install OS's, install OS's and replace OS's. But, why I can't uninstall an operating system within itself? Why they don't include ...
5
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3answers
704 views

Why can't computers boot instantly?

Computers have been around for quite some time. So what is stopping us from making computers boot instantly like regular home appliances and other devices? Is it even possible? I know there is ...
0
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2answers
112 views

Windows 8.1 installation closes after the windows symbol appears

I downloaded an .iso version of Windows 8.1 from dreamspark (so it's a legit copy). At the moment I have Vista installed on one HDD, and I want to install 8.1 on another. However when I go to boot ...
0
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1answer
80 views

How to make the networking between the host and the target?

I installed QNX IDE, Libraries and developemnt tool on Host system and QNX real time operating system is installed as a Target system : the target system runs the QNX Neutrino RTOS itself plus all the ...
0
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2answers
217 views

Understand what is happening in Linux with ps, top, and free

I'm running my java program on a 12 cores 24 thread machine. They have several processes that are running simultaneously. It seems that I performed too many processes so that the whole tasks made the ...
0
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2answers
342 views

Steps of changing from 32-bit OS to 64-bit and changing RAM?

My laptop is Lenovo T400, whose CPU is 64-bit and RAM is 1x2GB. When I bought it, it already had 32-bit Windows 7. Then I partition the hard drive and install 32-bit Ubuntu 12.04 alongside Windows 7. ...
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1answer
38 views

Installing Windows 8 with External DVD Drive

I have Ubuntu on my computer, and I have Windows 8 recovery DVDs. I do not have a build in DVD drive on my computer, so I bought an external one. Will the external DVD drive be able to read the ...
1
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1answer
68 views

Virtual Machine UEFI can't type “\”

I am trying to install SteamOS in Oracle VirtualBox. I know how to do it but in the UEFI, it won't let me type "\" it lets me type any other character but not this. Any ideas?
1
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0answers
130 views

Chrome OS sudo startunity app

I am running crouton unity on a Samsung chrome-book. How do i automate a shell script to start unity into a chrome OS app that I can place on the chrome shelf next to the other chrome apps? i want ...
0
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2answers
318 views

Does an operating system intervine after each time slice/quantum?

In the context of process scheduling, does the operating system intervene after each time slice/quantum ends? For example if the computer was idle and 4 tasks arrived : t1, t2, t3 and t4, and they got ...
3
votes
2answers
152 views

Does an operating system itself take up resources (aside from the space it is installed on)?

I just finished a course on operating systems and the definition of an operating system is still unclear to me. Does any operating system itself take up resources such as CPU and memory? For example ...
1
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0answers
82 views

Directory and segments in Multics operating system

In Multics OS there are different access rights in the access control list for segments (execute, read and write) and directories (status, append and modify)(book). How do segments correspond to ...
0
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1answer
764 views

How can i install visual studio express edition for web in windows vista?

I am using a windows vista operating system. I want to install visual studio express edition for web. But from system requirements i understood that vista doesn't support express edition? what can i ...
3
votes
1answer
78 views

What does gate mean in the Multics operating system?

I read Multics operating system. In the segment descriptor word (book) there is one part for number of gates for the segment. What does gate mean? I know the process can enter a higher-privileged ring ...
2
votes
2answers
2k views

Want to dual boot: Windows 8.1 / Ubuntu 13.10, but can't boot from flash drive and hard drive is reported as “full”

PC won't boot "bootable" flash drives. Hard drive is "full" and "140TB". ⠀Goal: Dual boot Windows 8.1 / Ubuntu 13.10, have functional hard drive Question may {contain, miss} (ir)relevant ...
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4answers
325 views

Why not create an OS that runs in ram?

this might be the wrong StackExchange site to ask this question, but I couldn't find one better. There doesn't seem to be one for questions about Operating Systems. I've been thinking recently about ...
1
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1answer
124 views

How a scheduler is scheduled?

A scheduler being a system program must be scheduled for execution so that it can wake up and schedule other programs. I read about process scheduling and algorithms but couldn't figure out how a ...
0
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1answer
5k views

window 7 cannot stop looping for failure configuring windows updates reverting changes

Anyone have this kind of problem before? I shut down my computer and I restart it. I can just see my screen show me about this line" failure configuring windows updates revert changes." After that, ...
0
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2answers
44 views

Installing OS on VIDEO hard disks

This is a dumb question since they name these in a confusing way. I am trying to build an surveillance application in Debian platform. Since HDD are categorized in Seagate site like this: Laptop ...
0
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2answers
127 views

Temporary operating system from floppy disk

I run Windows on my computer (which has a floppy disk drive and usb ports), and I want to try out a linux operating system. If I modify the BIOS to load from the floppy or usb first which contains ...
0
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1answer
76 views

What operating system is recommended for older systems? [closed]

I found an old laptop (MAXDATA ECO 4000A). What operating system should I install to make it run well? I need it for browsing the net only.
0
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1answer
1k views

What is SYSTAG.BIN on Windows 7?

I have a file named SYSTAG.BIN in my operating system root folder - what is it? is it safe to delete it? (couldn't find info about it on google)